For $45 a night less I'd go with the BCV studio. The rooms are very similar in size and decor. Yes, the BC room has the two queen beds. On the other hand the BCV studio has the fridge and micro, and more room to move around when the sofabed is closed. They both have their benefits I suppose, but if one is cheaper (especially by 25%) I'd go with it.
As for the sofabed, it is ok. They are in the process of replacing the full size sofabeds with queens. It is a sofabed, but I get a good nights sleep on it. We don't tour commando style and I'm still so beat at the end of the day that I sleep like a rock. We have a son is is almost 2 (he was one and a half on our last trip). We also have a daughter (4). Seeing as our son was never one for a crib, the girls get the queen bed while the guys get the sofabed. It works out fine.
As for other things to consider - you have free use of washers and driers at BCV (just have to bring/buy detergent). While I never thought we'd be happy about doing laundry on vacation, it is nice to be able to do a quick wash if you need something, and not have to bring so much stuff home dirty. The fridge is a must for us. Our kids drink a lot of milk and juice. My son also takes some medication he has to take with food. We always make a trip to the supermarket and buy milk, juice, yogurt, pudding, soda, etc. You can't imagine how much it can save, and how convenient it can be, to have these drinks and snacks/a quick breakfast in the room. If you stay at BCV there are more facilities you are likely to take advantage of. There is the BCV pool, which is nice for a simple, quiet swim when you don't want the excitement of SAB. You can use the pool and hot tub just about any time. That midnight soak in the hot tub sooths the tired muscles
- and you can't do it at the hot tubs by the main pool. Sure, if you stay in a BC room you could go over to the BCV pool, but you probably won't. The BCV building also has some nice places to relax, regroup, and gather. The TV room of the BCV lobby has comfy couches and kid size chairs, and is a great place to safely let a 2 yo run around for a few minutes while you sit and relax (as much as that can actually be done with a 2 yo
) - or just catch your breath. If you rent points to stay at the BCV you will also be able to take advantage of some discounts available to DVC members. Technically, guests and renters aren't entitled to DVC discounts. In reality, when you check in your room key will say "Member" on it and you will be given most DVC discounts.
One word of caution. Beware staying in BCV if you have no desire to own. We rented points to stay in a DVC studio two and a half years ago. We have been members for two years now
.