Hmm, I've always found that moveing from MAS to APC causes a REDUCTION in RPM, but an INCREASE in thrust most of the time.

RPM wise, I find an APC prop is about equal to a MAS of one higher pitch, so I'd expect a MAS 10x7 to rev about the same as an APC 10x6. But the APC will pull harder in most kinds of flying. The APC is certainly more efficient and quieter. So, most of the time, for best performance, try the APC. The MAS is a lot stonger though.