big different
3 parts must upgrade
1. steering system ------3racing enough , tamiya too expensive
2. motor mount------get yeahracing one, it can add heat sink, which is better than 3racing and its cheaper than tamiya
3. damper ---- tamiya TRF for sure
It is depend on what model & Version you selected. If A210SS, ABC Goose Naked S or Tech Racing CFR kit that may not be invest so much on optional parts. Of course, if you are running as stock motor then I don't think you need to modify too much, all is good. However, 有時改車只是用來睇的.... like me.