im currently running the traxxas 5 cell 1100mah 6v hump pack in my t-maxx. i also have a reedy 5 cell 1600mah 6v pack im selling. im thinking about switching to the reedy because its 500mah bigger. i could keep the traxxas as a back-up. or sell it. as far as power and which is better, they are pretty much equal correct?