Mate, your questions have been adressed several times. Never underestimate the power of the search button...
Anyway, T2R is a cheap version of T2. FRP (fiberglass) instead of carbon fiber chassis, simpler diffs, composite outdrives, plastic wheel hex.
On track there shouldnt be a major difference, specially on asphalt and if you are new to the hobby.
T2007 EU is for asphalt, USA is for carpet.