They both have about the same entrance requirements, with UK's Mcats and Gpa being just a tad bit higher. I've interviewed at both schools as well.
UK - Block schedule, smaller class size, perception of having the better pre-clinical years, smaller and cleaner hospital campus
UofL - Tratitional schedule, larger class size, perception of having the better clinical years, larger hospital campus and city
I think they both definitely have their strengths and weaknesses. I think you should pick the one that seemed right for you. Did you get that feeling when you vistited either of them?