Wow, what an interesting question.
I am a different person than I was when I rushed, even though it was only 8 years ago. I'm sure I'd weigh things very differently. I guess I'm more at peace with society's rules - I wouldn't assume a chapter was full of mindless conformists just because they dressed better during rush, for example. And I'd pay more attention to whether a chapter excelled in various areas - I don't mean which is most popular, but a chapter that could point with pride to its achievements.
However, in the end, would I end up someplace different? I don't know. Well, technically, yes, because my chapter is now closed, so joining it wouldn't be an option.
And the chapters have changed, too, so the chapter I rejected before for being full of sweet but uninteresting girls is now producing the top campus leaders.
But if we had a magical time machine that could transport me back in time to my formal rush, keeping me who I am while turning me back into a freshman - well ... would I retain the foreknowledge I have now? Knowing my chapter would shrink and close? Knowing that several of my favorite people from my second choice chapter depledged and went elsewhere? Knowing that, I would stay where I am now, because I have a strong belief in my sorority's unique ideals and outlook, and I'm in this for life. But if I didn't know any of that, and was looking forward to those four years of college with a blank slate, I very might well have chosen differently. And no matter where I joined, I'm sure I'd look back later and see strengths of the other chapters I missed at the time, and weaknesses in my own chapter I had not anticipated.