RC car action just published an article showing the differences between the RTR SC10 and the RTR SC10RS
Here they are:
V2 shocks: Easier and quicker maintenance and filling. No need for special tools anymore for removing O-rings, and most importantly (Personally speaking, B4 shocks suck to refill)
a bleed screw. Much easier to Bleed them now
Hex hubs up front: The SC10RS now uses the same wheel in both front and rear
Water "Resistant" electronics: you can't submerge them or hose them off when they're dirty, but at least you can drive through the rain now
JConcepts rear tires: No big deal, considering they'll wear out.
new stronger more durable differential
4 big changes
1 (tires) not so important change
B4 Mamba. 'Nuf said.
RC18T (added wing)
GC-3 gatekeeper Losi Mini-Crawler
Original Mini LST (Exo-Tek LXT Single Servo Converson, Traxxas servo)
Soon to be Quadcopter.