Since the T1 was introduced there were 3 versions
the T1, T1 EVO 2, T1 EVO@ FOC (Freedom Of Choice)
Same length for all suspension bodies, semi stiff upper deck, some hopups (ie better ball bearings)
EVO2-> EVO2 FOC
The ability to choose the c-hub suspension
The T1R is a T1 EVO2 with c-hub and instead of carbon has some sort of plastic
No matter what you choose you can't go wrong!