E-M5 IQ versus E-P5 IQ
Multiple review sites observed that the JPG sharpening is turned back down in the E-P5 (to more sane levels). Many recommend using the E-M5 with -2 sharpening, and without noise supression for JPGs, which is what I do as well. They note that with both the E-P5 and E-M1 you can leave the settings at default.
Look at the RAW comparisons.