I can't decide which to apply too...

At the open day, my two favourite colleges were Trinity and Christ's, both of which were awesome. I wanted to go to Trinity because it is where so many of the top scientists/mathematicians went, it's the biggest college (i.e. largest student body), and the buildings were beautiful (I'm a sucker for old, elaborate buildings

). I went to the open day in the mindset that I would apply to Trinity. Unfortunately there were no tours, so you could only see the buildings/gardens/{a student room}.
But I loved Christ's too (and Kings actually, but apparently it is quite informal, which I wouldn't like. That's part of going go Cambridge, after all, right?) when I was there. The quirky mathmo who was doing our tour was really friendly, and it just felt like a really welcoming place. It's the opposite of Trinity though size wise, as one of the smallest colleges!
I'm so torn, that I'm starting to lean more towards Christ's (yes I know that doesn't really make logical sense), as Trinity is supposedly the hardest college to get in to; and whilst Christ's won't be easy by any means, they sometimes give an easy offer to people! Odds of me getting one are infinitely small, granted, but they aren't
exactly 0.

Of course, I realise it would be somewhat foolish to choose where to apply to on this basis, but it's all I have to differentiate them at the moment!
I just can't make up my mind at all. What do you think of them both, which do you prefer, why?