The SPX stock spec ESC is specially designed for Spec motors like 9.5T or 13.5T so these will have higher RPM in compare to other ESC. That´s the pro in compare to the TC-Spec.
For low turn modified motors this may be a little too much so some of the usual power profiles (but not all) as used with the Sphere Competition versions are also included in this ESC from what I know.
If you´re running modified the TC-spec still will be the best choice, for spec motors the new SPX stock spec then.
I can not find anything on the above mentioned SPX stock spec esc. Could you tell me where to find this info? Thanks.