Lets say you have CF and OEM props, the CF will bend less (till they snap), you are hovering or cruising, the CF props will requirer less RPM to give the same lift but will need more amps to rotate them. The energy rquirered from the battery will be the same to lift a craft of the same weight off the ground, gravity is constant. The control moduel will max the amp draw and thats how fast you will go. More pitch = less RPM = X lift = Y amps...Less pitch = more RPM = same X lift = same Y amps. You are doing the same amount of work (mah) regardless of RPM variance to keep the craft airborn. The only area that could help would be in the design of the prop to attain the best pitch for the job and I think that DJI has this figured out very well.