Acceleration comparisons

[MaxGunz]

Is giving it full throttle and RPM going to give the best acceleration especially to heavy planes with huge power?

Most prop speed controls will try and maintain prop RPM which at lower speeds may be course enough to stall the prop just keeping it from over-rev. Manual 100% RPM will waste full power but at least be a bit better than prop AOA too high. Either way is "spinning wheels" without smoke and noise to show it.

Getting the most out of a plane isn't 'simply' anything.

If you want accurate data, get a devicelink data logger like UDPSpeed and ditch the stopwatch.