Bashing truggy
It's down to personal choice as this point.
The Revo comes with the (capable) TRX2.5 engine, not my favourite engine, there are some excellent big blocks that just drop straight into the Revo, but the downside is the double investment on the engine.. unless you sell the TRX engine off as new
The X1-CRT is more of a racer than basher, I have the non RTR version. I'm busy experimenting with two engines in the truck, an LTP Z.28 Spec 2 and an RB S7-II .21. The CRT Pro is light for a truggy and is very capable with a .21 engine