Emirates seatiing / aircraft versions on specific routes

I'm flying EK764 JNB-DXB (A380-800) / EK201 DXB-JFK (A380-800) in October, and EK214 FLL-DXB (B777-200LR) / EK776 DXB-JNB (B777-300ER) in November. I see there are various possible classes / versions and therefore seating configurations for each of these aircraft. I guess supply & demand on each route determines which aircraft is used.

How can I tell what class / version is applicable on the routes above?

Is there a clue in the flight name/details?

The EK site shows seat availability easily enough when managing your booking. So, I'm assuming they know their aircraft best and my seat selection is true to what I see. However, if I look at Seat Guru and other such sites, there is a fair amount of variation, especially on the 777s. Seat Guru shows 2 seats configuration in row 36J/36K on Emirates B777-200LR but Emirates shows three seats together.

The EK site shows seat availability easily enough when managing your booking. So, I'm assuming they know their aircraft best and my seat selection is true to what I see. However, if I look at Seat Guru and other such sites, there is a fair amount of variation, especially on the 777s. Seat Guru shows 2 seats configuration in row 36J/36K on Emirates B777-200LR but Emirates shows three seats together.

I'm tempted to say that given a choice between having absolutely no information whatsoever, and a seat map on seatguru, I would prefer having absolutely no information whatsoever. That would be a little unfair, but seatguru is often woefully out-of-date and/or simply wrong. For example, for BA aircraft seatguru continues to show seat maps for configurations that have been out of service for years.

FWIW, this is real-time information from a GDS:-

Seat Map Search:
Departing JNB on 20/10/18 for DXB
Flying EK flight 764 in Economy

       A   B   C       D   E   F   G       H   J   K   
41  E   #   #   #                           #   #   #   E   
42      P   P   P                           P   P   P       
43      P   P   P                           P   P   P       
44      P   P   P                           P   P   P       
45      P   P   P       #   #   #   #       P   P   P       
46      P   P   P       P   P   P   P       P   P   P       
47      P   P   P       P   P   P   P       P   P   P       
48      P   P   P       P   P   P   P       P   P   P       
49      P   P   P       P   P   P   P       P   P   P       
50      P   -   -       P   P   P   P       P   P   P       
51                      -   -   P   -                       
52  W   #   #   #                           -   -   -   W   
53  W   -   -   -                           -   -   +   W   
54  W   +   +   +       #   #   -   -       +   +   +   W   
55  W   -   -   -       +   +   +   -       -   +   +   W   
56  W   -   -   -       -   +   +   +       +   +   +   W   
57  W   +   +   +       +   +   +   +       +   +   +   W   
58  W   +   +   +       +   +   +   +       +   +   +   W   
59  W   +   +   +       +   +   +   +       +   +   +   W   
60  W   +   +   +       +   +   +   +       +   +   +   W   
61  W   +   +   H       H   +   +   H       H   +   +   W   
62  W   +   +   H       H   +   +   H       X   X   X   W   
63  W   +   +   H       X   X   X   X       X   X   X   W   
64  W   +   +   H       X   X   X   X       X   X   X   W   
65  W   +   +   H       X   X   X   X       X   X   X   W   
66  W                                       +   +   X   W   
67  E       #   #       X   X   #   #       #   #       E   
68  E   #   +   +       +   +   +   +       +   +   -   E   
69  W   X   X   X       H   +   +   H       H   +   +   W   
70  W   X   X   X       H   +   +   H       H   +   +   W   
71  W   X   X   X       H   +   +   H       H   +   +   W   
72      +   +   H       H   +   +   H       H   +   +       
73      +   +   H       H   +   +   H       H   +   +       
74      +   +   +       +   +   +   +       +   +   +       
75      +   +   +       +   +   +   +       +   +   +       
76      +   +   +       +   +   +   +       +   +   +       
77      +   +   +       +   +   +   +       +   -   -       
78      +   +   +       -   -   -   -       -   -   -       
79      -   +   +                           +   -   -       
80  E       #   #                           #   #       E   
81  E   #   +   +                           +   +   #   E   
82      +   +   +       #   #   #   #       +   +   +       
83      +   +   +       +   +   +   +       -   +   -       
84      +   +   -       +   +   +   +       +   +   +       
85      +   +   +       +   +   +   +       +   +   +       
86      H   H   +       +   +   +   +       +   H   H       
87      H   H   +       +   +   +   +       X   X   X       
88      H   H   +       +   +   +   +       X   X   X       
       A   B   C       D   E   F   G       H   J   K   

Seats
Premium Only             P                        
Available                +                        
Handicap-Accessible      H                        
Paid & Premium           #                        
Occupied                 -                        
Blocked                  X                        
Lavatory                 L                        
Paid                     $                        

Location
Exit Row                 E                        
Wing                     W                        
Upper Deck               U                        

Seat Map Search:
Departing DXB on 21/10/18 for JFK
Flying EK flight 201 in Economy

       A   B   C       D   E   F   G       H   J   K   
43      #   #   #                           #   #   #       
44      P   P   P                           P   P   P       
45      P   P   P       #   #   #   #       P   P   P       
46      P   P   P       P   P   P   P       P   P   P       
47      P   P   P       P   P   P   P       P   P   P       
48      P   P   P       P   P   P   P       P   P   P       
49      P   P   P       P   P   P   P       P   P   P       
50      P   P   P       P   P   P   P       P   P   P       
51                      P   P   P   P                       
52  W   #   #   #                           #   #   #   W   
53  W   +   -   -                           +   -   -   W   
54  W   +   +   +       #   #   #   #       +   +   -   W   
55  W   -   -   -       -   +   +   +       -   +   -   W   
56  W   +   +   +       -   -   +   +       +   +   +   W   
57  W   +   +   +       +   +   +   +       +   +   +   W   
58  W   +   +   +       +   +   +   +       +   +   +   W   
59  W   +   +   +       +   +   +   +       +   +   +   W   
60  W   +   +   +       +   +   +   +       +   +   +   W   
61  W   +   +   H       H   +   +   H       H   +   +   W   
62  W   +   +   H       H   +   +   H       H   +   +   W   
63  W   +   +   H       H   +   +   H       H   +   +   W   
64  W   +   +   H       H   +   +   H       H   +   +   W   
65  W   +   +   H       H   +   +   H       H   +   +   W   
66  W                                       +   +   +   W   
67  E       #   #       #   #   #   #       #   #       E   
68  E   #   +   +       +   +   +   +       +   +   #   E   
69  W   X   X   X       H   +   +   H       H   +   +   W   
70  W   X   X   X       H   +   +   H       H   +   +   W   
71  W   X   X   X       H   +   +   H       H   +   +   W   
72      +   +   H       H   +   +   H       H   +   +       
73      +   +   H       H   +   +   H       H   +   +       
74      +   +   +       +   +   +   +       +   +   +       
75      +   +   +       +   +   +   +       +   +   +       
76      -   +   -       +   +   +   +       +   +   +       
77      +   +   +       +   +   +   +       +   +   +       
78      +   +   +       +   +   +   +       +   +   +       
79      +   +   +                           +   +   +       
80  E       #   #                           #   #       E   
81  E   #   X   X                           X   X   #   E   
82      X   X   X       X   X   X   X       X   X   X       
83      X   X   X       X   X   X   X       X   X   X       
84      X   X   X       X   X   X   X       X   X   X       
85      X   X   X                           X   X   X       
86      X   X   X                           X   X   X       
87      X   X   X                           X   X   X       
88      X   X   X                           X   X   X       
       A   B   C       D   E   F   G       H   J   K   

Seat Map Search:
Departing FLL on 08/11/18 for DXB
Flying EK flight 214 in Economy

       A   B   C       D   E   F   G       H   J   K   
14  W   X   X   X       X   X   X   X       X   X   X   W   
15  W   P   P   P       -   -   -   -       P   P   P   W   
16  W   P   P   P       P   P   P   P       P   P   P   W   
17  W   P   P   P       P   P   P   P       P   P   P   W   
18  W   P   P   P       P   P   P   P       P   P   P   W   
19  W   +   +   H       -   +   +   H       H   +   +   W   
20  W   +   +   -       +   +   +   -       -   +   +   W   
21  W   +   +   +       +   +   +   +       +   +   +   W   
22  W   +   +   +       +   +   +   +       +   +   +   W   
23  W   +   +   H       H   +   +   H       H   +   +   W   
24  W   +   +   H       H   +   +   H       H   +   +   W   
25  W   +   +   H       H   +   +   H       H   +   +   W   
26  W   +   +   H       H   +   +   H       H   +   +   W   
27  W   +   +   +       +   +   +   +       +   +   +   W   
28  W                   -   -   +   +       +   +   +   W   
29  W                                       +   +   +   W   
30  E   #   #   #                           #   #   #   E   
31      X   X   X                           +   +   +       
32      X   X   X       #   #   #   #       +   +   +       
33      X   X   X       +   +   +   +       +   +   +       
34      +   +   +       +   +   +   +       +   +   +       
35      +   +   +       +   +   +   +       +   +   +       
36      +   +   +       +   +   +   +       +   -   -       
37      +   +   +       +   +   +   +       +   +   +       
38      +   +   H       +   +   +   +       H   +   +       
39      #   #           H   +   +   H           #   #       
40      #   #           H   +   +   H           #   #       
41      #   #           H   +   +   H           #   #       
42                      +   +   +   +           X   X       
43                                              X   X       
       A   B   C       D   E   F   G       H   J   K   

Seat Map Search:
Departing DXB on 09/11/18 for JNB
Flying EK flight 767 in Economy

       A   B   C       D   E   F   G       H   J   K   
17  W   X   X   X       X   X   X   X       X   X   X   W   
18  W   P   P   P       P   P   P   P       P   P   P   W   
19  W   P   P   P       P   P   P   P       P   P   P   W   
20  W   P   P   P       P   P   P   P       P   P   P   W   
21  W   P   P   P       P   P   P   P       P   P   P   W   
23  W                   #   #   #   #                   W   
24  E   #   #   #       +   +   +   +       #   #   #   E   
25  W   +   +   H       H   +   +   H       H   +   +   W   
26  W   +   +   H       H   +   +   H       H   +   +   W   
27  W   +   +   H       H   +   +   H       H   +   +   W   
28  W   +   +   +       +   +   +   +       +   +   +   W   
29  W   +   +   +       +   +   +   +       +   +   +   W   
30  W   +   +   +       +   +   +   +       +   +   +   W   
31  W   +   +   +       +   +   +   +       +   +   +   W   
32      +   +   +       +   +   +   +       +   +   +       
33      +   +   +       X   X   X   X       X   X   X       
34      +   +   +       X   X   X   X       X   X   X       
35      +   +   H       H   +   +   H       H   +   X       
36      +   +   H       H   +   +   H       H   +   +       
37  E   #   #   #                           #   #   #   E   
38      X   X   X       X   X   -   -       -   -   -       
39      X   X   X       H   +   +   H       H   +   +       
40      X   X   X       +   +   +   +       +   +   +       
41      -   +   -       +   +   +   +       +   +   +       
42      +   +   +       +   +   +   +       +   +   +       
43      +   +   +       +   +   +   +       +   +   +       
44      +   +   +       +   +   +   +       +   +   +       
45      +   +   +       +   +   +   +       +   +   +       
46      #   #           +   +   +   +           #   #       
47      #   #           +   +   +   +           #   #       
48      #   #           +   +   +   +           #   #       
49      #   #           +   +   +   +           X   X       
50      #   #           +   +   +   +           X   X       
       A   B   C       D   E   F   G       H   J   K   

Thanks Globaliser! It is as I thought. I've selected my seats. Tried a tip I was given where you book seats A & C leaving B empty hoping that if the flight is not full, you and your partner get to share the empty space. But, if it's booked, then you simply offer the aisle seat to the lone traveler. Who'd say no to that?

Tried a tip I was given where you book seats A & C leaving B empty hoping that if the flight is not full, you and your partner get to share the empty space. But, if it's booked, then you simply offer the aisle seat to the lone traveler. Who'd say no to that?