Convert standard manual valve body to reverse - what is needed?

I am toward the COPE rmvb w/low band with the servo kit. There are two options; the street-2x which is rated at 140psi (https://www.coperacingtrans.com/?product=crt-727-904-pro-street-reverse-manual-valve-body) and the race-22x which is rated at 155psi (https://www.coperacingtrans.com/?product=crt-727-904-race-reverse-manual-valve-body). I didn't see a psi rating on any other mvb.

I assume the race-22x has crisper shifting that puts more wear on the transmission? And the street doesn't put as much wear? Am I understanding this correctly

My car will spending 99% of street