First of all thanks for your replies. Really good input which has made me think a lot. Sorry I didn´t answer before (technical problems). Before getting into it: I decided to go to B-School (private message if you want to know which).
Lgomez: Lead a business of which I will/would be partner (with minority). Ultimately, my involvement was really complicated (long story).
Alex:
Your post was great and made me go through a lot of thinking. Must say I agree with many of your points, don´t agree on others (maybe experience will teach me otherwise).
The romanticism of being an entrepreneur does die really fast when stressful moments come. I´ve lived them, put of weight, gone into depression, and shed a stress tear. I quit a job to become an entrepreneur. For some moments, I could have payed to go back a couple of months back to get my job back. Those experiences came with a cost, and I would not want to live them again, but I am glad I did, and I know that next time I won´t make the same mistakes. I don´t know what I´ll do next, but I´ll definitely try something. Which takes me to my next point.
For some reason, I do feel the need to begin NOW (or ASAP). Why? I think Eureka moments are important, but I don´t think that waiting 10 or 15 years for them to come is the correct strategy for me. At my job, there was rarely any time for me to sit and work through an idea to develop (working 9 am to 8 pm at least for 5 days a week). After quitting my job, I have become more observant and very motivated to develop new ideas (still haven´t capitalized on many). I love that feeling, and as an employee it was hard for me to find it, perhaps at a less demanding job I would have.
Also, as years go by it may be more difficult for me to take entrepreneurial risks. I can´t deny that the fear of not being able to afford family expenses would keep me at a job, probably forever. I can afford those risks now, maybe not later.
In my case, I will try and force the issue ("I am going to have a business plan by the time I graduate [and will have pitched it several times]"). I am going with that mindset because I think that´s the way it works for me, maybe in 2 years I will think differently (Apple ad here), I´ll let you know. I don´t plan for my business to be Google 5 years after graduation, but I do plan to work hard on it for 15 to 25 years for it to become something of value to society.
In the end, I took your advice: "worry less about "entrepreneurship" and more on which school you'll likely enjoy more and yield a richer life experience". I chose the one my heart felt more in place with, and where I believe I can obtain a better experience for what I am looking for.
BTW, both schools are INCREDIBLE, in the end it was more about fit and circumstance. It´s hard to give advice on "which is better", I realized both are, but in the end, one is better... for me.