A 2s 1/10th scale car draws the same number of amps as a 1/8 scale car, but 1/8 scale runs on double the voltage or more, so therefore, more than twice the power already. In other words, the MM pro would have to be rated for less amps than the original MM to be insufficient for 1/8th. That seems unlikely to me.
Check out my custom converted 8ight:
Sub 7lb, lowest CG of any 1/8 buggy