mm vs mmm why does one make more power?

[mxracer]

ok i dont know if anyone has noticed , or if anyone could explain why and how. but i have multiple trucks with similar setups , and time and time again its very clear that the old mamba max makes more power , more punch than a mamba monster.
the setup is

losi 8ight-t
#1 has mamba max (ext bec and fan only mods) neu tekno1515 1y geared 48/14
on 4s flightpower 4900

#2 has MMM and neu tekno 1515 1y geared 48/14 on same cells.

esc settings are the same
timing 10deg , punch control off , start power low . throttle curve linear.

it doesnt matter what packs i use and if i swap packs . the MM makes more punch and power. (you can even hear it by the tone of the motor screaming) yet drag racing each truck they have the same top end. and its is noticable that the MMM is smoother controller.

can any castle techs explain ? or has anyone else noticed this as well?