One other thing to consider is that sometimes vacationing with another family at Disney can be stressful -- and having two separate studio rooms can allow everyone to have their own space. Just something else to think about.
Another thought -- I would suggest having one room get the deluxe dining plan and the other room not get a dining plan. It's around $105 per adult per day and gives you 3 TS meals per day -- and those include apps and desserts. You can easily split those among your group during meals, since all of the credits get pooled into one big account. If you have any kids 3-9 years, then it is a steal of deal, since they can order from the adult menu (order adult menu item for guest and pay for kid's meal out of pocket).
- Deluxe dining plan meal credits are not differentiated in Disney’s system between children and adults (as of mid-2017). Technically, you are supposed to order from the children’s menu, even on the Deluxe plan, but in practice many restaurants will let a child order an adult meal with a Deluxe credit. It certainly doesn’t hurt to ask. Note that this will not work with the regular Dining Plan – their table-service credits for children and adults are tracked separately, and children have to use a child credit and order from the children’s menu (or see below; some restaurants will make child portions of other food).
- With the Deluxe plan, one strategy that can work reasonably well is to pay out of pocket for children’s meals (or share food from an adult meal), conserving your credits to use for adults. For example, say you have a party of 4, 3 adults and 1 child, which gives you 12 Deluxe credits per day to use for any kind of meals you want. If you only use your credits for adult meals, you could use 3 credits for breakfast and 3 credits for lunch, leaving you with 6 credits to buy three adult Signature meals. You would either pay out of pocket for the children’s meals or share food from the adult meals.