T-Maxx 3.3 has some weak parts, I know the center drive shafts will have to go, they are week, you could replace those with center CVD's and the diffs are pretty week too, I just blew my rear diff on my maxx today with the 2.5. The Revo is a very nice truck, and you will be able to upgrade alot of stuff on it like the center diff. Revo is definately a racer where the Maxx is more of a basher.