I don't see how there's enough information available to make that determination yet.
Disney's press materials site 480 villas but offers no specifics. Is a lockoff counted as one or two villas in that number?
Is there are larger proportion of Studio and One Bedroom villas in the
DVC count than we may be used to?
Are the hotel rooms the same +/- 350 sq ft units we are used to seeing at the Disney parks? What percentage of them are suites?
How much space in each building is occupied by support services (backstage areas, concierge lounge, restaurants, luggage storage, child care, etc.)?
The building on the right looks to be about 40-45% larger than the one on the left. Without answers to some of the above questions, it's hard to tell if that's enough space for the greater number of villas or not. But the style of BWI/BWV suggests that its designers saw some logic in putting the hotel on one side and timeshare on the other.
With all of that said, does any of this really matter? Have we already reached the point of deciding that one "side" of the resort is better than the other?