I also own 3 Savages, an LST2 and a recently acquired Revo so I can speak from all aspects.
The Tmaxx was the original MT. Many improvements have been made since. My Maxx was 100% RPM and other AM parts. It handled ok, but I usually broke something every time out.
The Savage is a much stronger truck. Its a tank and handles that way. Its ment for bashing, not racing.
The Revo is a racing MT. Better for racing, but not as tough as the Savage. Just what the trucks were built for.
The LST is somewhere in the middle. Pretty tough truck, handles much better than the Savage, but it weighs a ton. Call it a precursor to the Revo.