Also, the dynamics of pedaling are different with different cranks lengths.
This won't matter much to beginners and maybe intermediate racers. But when you get to the point of fine-tuning, then it might matter.
Power is a function of torque on the pedal and cadence. Torque is a function of crank length. So, therefore, crank length affects how much power is recorded by power meters. Higher or lower numbers may not be good or bad, just understand that they are different.