X1 and X5 both are same kind of rc car, buggy
Check out the particular thread for more about X5 here. X5 Prospec prices 1/3 more of X1 here [&o] for everything tough enough to take any challenge. Someone will mention X5 as a tank and its motion is like a tank too, no twisty. X5 is probably a buggy for any level and handy to dial and easy to get in, since it is pin ball steering. Assembling an X5 is a mechanic's job, proper tools are a must although it comes with a set of hex keys (keep the wrench safe provided together with the kit, it has the name on

).
there are couples of X1 pro running on my local without significant problem, the only one is about the damper that need care. It performs like 777 over cornering and jumping, a bit twisty but acceptable to experiened driver. It is called pro but there are options to make it more pro.
I will finish the coming race with my X5 Prospec then get an X1 for next race season if Kyosho break their mouth about the SP2.