I visited both schools on Friday. There wasn't a dramatic difference between the facilities. The UML facility was brand new in 2002, but the Temple facility was nice as well. However, I found a very different atmosphere at each school. UML seemed friendlier, more welcoming, and more accessible. Temple is located on a high speed city street, while UML was surrounded by a number of medium and slow paced streets. A large number of students live within walking distance at UML, while at Temple I'm not even sure that is an option. A lot of Temple students live in the Center City of Philly, a nice area. But that means they have to commute to get to classes.
At UML, there was more of an integrated social environment. The 1L/orientation groups are 25 students at UML, while they are 60 at Temple. The school at UML was a destination for students to gather for studying and fun, even now. The only students that I saw at Temple were taking a class in preparation for the bar exam. At UML, there were a number of students studying together or socializing off and on during my short visit. UML had a large number of student lounges, an outdoor patio area, an indoor cafe, open student mail slots, etc. Temple did have a few lounge areas, but I saw none of the other student/social-friendly features. At UML, I am sure there is much more student-to-student interaction -- academically and socially.
If you care only about the academic experience, the schools are probably not that much different -- each having its own strengths. Since I'm looking for a more complete educational experience, UML is now clearly my choice.