I believe Aeroventure uses Czech Sport Cruisers for primary training. They're neat little two seaters with a fancy glass cockpit. Air Ventures offer more traditional Piper's with 6 packs.

Being in New England, your training pace will mainly be limited by weather. Next would be instructor and aircraft availability. I would visit both schools and see how many !!FULL TIME!! instructors are employed and how many aircraft are available. The more the merrier. Every school is going to tell you, you can fly everyday! But few are actually organized enough to make it happen.

It's also worth asking whether you have to pay tuition up front, or in installments, or a la carte.