Actually, I was thinking more of the Viking Expedition cruises on the Great Lakes and its Canadian Discovery cruises from Toronto to NYC. These are port focused and there is very little use for the expedition toys. We had some great included tours on the Discovery cruise, and had several options. O doesn’t do the Great Lakes but does similar Canadian cruises with the same ports..
Viking Expeditions also does South American, non-Antartica, cruises that have a mixture of ports and expedition type options, But the itineraries are similar to O's, just more options in the fjords. We're booked on one of these and selected some interesting included port options out of several that were available.
So this comparison may be more like Gala apples to Honey Crisps.