Originally Posted by Markus

Bodies are the killer for this M sized chassis cars. all the 210 bodies are ridiculously priced. I run the 225 only because I refuse to pay $45 to $60 for an unpainted mini body.
I race my CR so my bodies are not used for modeling. Using the 225 wb allows me to use the cheaper HPI Miatas and civics ($20). I can't justify spending twice as much for a mini body than for my touring car CTR sedan body.

to reference your question. the 210 size should give you quicker reactions, ideal for a technical track. the 225 body would benefit in a larger flowing track.

Both wheelbases can work equally on any track.

HTH.