The lockoff 2 bedrooms are actually a 1 bedroom plus a studio with the connecting door opened. You have 2 outside entrances, one from the 1 bedroom side and one from the studio side (second bedroom). The studio side has a kitchenette. In the dedicated 2 bedroom, an additional closet takes the place of the outside door in the second bedroom and an extra bathroom sink and counter take the place of the kitchenette. It is called dedicated because it cannot be split into a 1 bedroom & studio.
If you have 2 families staying together, the lockoff might be better because the family in the second bedroom would have their own entrance and kitchenette. If you're one family with small children in the second bedroom, you probably don't want them to have a separate entrance and the kitchenette. I stayed in a dedicated 2 bedroom at OKW with 3 friends, I shared the second bedroom with 1 of them. It was nice to have 2 bathroom sinks to get ready in the morning, plus we each had our own closet. We all used the main kitchen. OKW and WLV have both lockoffs and dedicated 2 bedrooms. BWV is strictly lockoffs.