I changed from GWS props to APC slow fly props because when I pulled hard on the elevator or rudder I could hear the GWS props flexing, changing pitch. When I started using the APC props that noise almost completely went away and I gained a bit more power. Flight times remained about the same. I never have checked the RPM with my tach on my Eflite Ultimate, I just never really cared that much.

I always paint 1 of the tips on my props for safety and for balance and found that on the GWS props the paint would crack while flying due to the flexing. The APC props don't do that.