1) money- are you 100% sure that Touro is not increasing tuition yearly? Talk to the admin about that and don't rely on websites/printed material for this. As far as I know tuition seems to increase 3%-5% yearly at many private schools. Seems odd for the school not to increase tuition since the school is in NYC and it is new.
living in the city (Touro-NY) would be nice though. you would NOT need a car and living expenses might be comparable to LI.
2)travel - ok you have a car already. lol! I can't comment on this since some people HATE the subway. I don't mind public transportation.
3)The Dean you are speaking of was in charge of clinical rotations. This is very important. I'm sure he will do a great job of running the school.
4)Just about every school in NYC has a large jewish population because it is NYC. NYCOM is no exception. There is a club for those interested in the jewish community. They do many events religious and non-religious. the school seems pretty accomodating to the jewish calendar. sometimes there is a conflict and students are willing to switch so fellow classmates may observe their religious holidays. we had an exam on friday in nov/december and I think the administration made accomodations so the jewish students took their practical before everyone else so they could get home in time for sabath. I think the sun was setting at 430pm. I'm not jewish so maybe this is not the best perspective.
NYCOM is a very diverse school and really relfects the population of the city quite well. I do think that is something important.
I honestly feel you will do well at either school. I just wanted to add some things to hopefully help your decision making. It appears you have a tough decision to make.