Greetings While you and I have never crossed paths on board. We have definitely seen each other on message boards
For a very detailed comparison between Oceania vista and EJ please take a look at my post from February when we sailed on the vista, having previously sail explore journey last october. EJ is far and away superior in many comparisons IMHO however it all boils down to what one is looking for. Food and ambiance much better on EJ as well as personal attentive upscale service. Entertainment on Oceania much more diverse and more high end Although while on e j, we were treated too incredible steinway artists
We have enjoyed the Retreat on Celebrity yet EJ better more luxurious experience. Specialty restaurants on O were excellent
Best way for me to sum up is we just booked EJ again for next year. If you look at the thread for the comparison, it will be very informative because there are some definite drawbacks on the back of the house issues for explorer journey to consider although my recent booking and experience was excellent and evidenced significantly improved service.
Good luck. There are some very attractive pricing on some of EJ offerings
Hope my input assists you
ENJOY