for me.. i will try buy X1-CRT...bcz you can upgrade it to X1-CRT pro version when the parts is broken...step by step...
Kyosho ST.... I don't think anyone will upgrade to STR... bcz it is almost buy the whole car...
for sure their price is almost $1k different .... I means Kysoho ST and X1-CRT RTR....but I believe the engine for X1-CRT must durable then the kyosho engine....