Help deciding between offers --- With a twist

Hi everyone,

I've been lurking around this site for some time and actually own two of the interview prep guides. I've learned a lot from everyone here just reading, but now I need some advice.

I go to a non-target, and was able to secure two offers for internships through networking with alumni. Now, I need to decide where I'm going to work for the summer -- but theres a bit of a problem.

The first offer I got was through an alumni of my fraternity and university that works at GE Capital. I had a phone interview with him and one other person, and then I was offered a spot in their Risk Management internship program the next day. I thought it was very odd that I wasn't asked to come in for a "superday" or anything like that...but hey, who was I to complain.

The second offer came from RBS for their S&T rotational program. I had a phone interview with an alumni and apparently he put in a really good word for me, because when I went to the superday it was basically a formality. They walked me around the offices and also had me sit down and informally talk with a few MDs. Honestly, this may be a bit shallow, but it felt really good to hear them say how much they wanted me to work there (I was obviously taken back by this). Needless to say, I got the offer.

Now heres the problem, the GE offer expired a week before the superday at RBS. Since I can't predict the future, I sent in my letter of acceptance but did not include any other paperwork. Now that I have the offer with RBS, I'm unsure of which offer to take.

Heres what I'm thinking in terms of each offer:

GE CAPITAL- I was put in touch with the alumni that hired me by a senior who just received a full time offer from them. The alumni sent me 3 emails basically laying out the interviews and exactly what to expect. It was a layup. With that being said, I would feel really bad screwing this guy over if I decide not to take the offer.

The offer is in Norwalk, CT which I'm not excited about and pays $770 a week. They pay for housing (which I'm assuming will basically be a dorm room??).

Also, this is their risk management program. I know I'll probably be doing a lot of excel work and risk is essentially a very important part of every transaction but I don't know how well it will translate to future positions.

RBS- The offer is for the Stamford, CT office. The culture seemed very relaxed while i was there. Half the office was wearing suit and tie, 35% was wearing slacks and button down shirt, and 15% was wearing jeans. One of the MDs i spoke with was wearing sneakers.

The pay is higher, prorated off 70k, and they do not pay for housing. The offer is for the rotational S&T program. This is most likely going to be 1 week of training, three 3 week rotations either in sales, trading, strategy, treasuries, or structuring.

Basically, I need some advice...especially if you've worked/interned at either one of these places. I originally thought I wanted to do pure IBD (M&A, Coverage group, etc) but now I am unsure. If anyone could offer some insight into these offers and which one I may enjoy the best or will be best suited for future career goals I would really appreciate it.

Also, how will it look if I rescind on the GE offer?

Sorry for the long post.