Lecom is in a beautiful location, should be cheaper, and they give you lots of clinical experience. Moving that 4th year might suck so if that is not something you want to do then...yeah. It does mean that as a D3 you are not having to share with the D4 class. You get to take on more complex cases and there are plenty of patients flowing through. Also, you get your own operatory the entire D3 year. D4 year you are in clinic full time (7am - 1pm or 1pm - 7pm).
Louisville is a cool city but...when I drove by the school it didn't seem like the safest area. I felt the opposite at lecom.