i know there is a big amperage difference but i was thinking since the esc is only rated for 45 amps and it barely even gets warm both sets of batteries would supply enough amps to get pretty much the same speed but just a little shorter run time with the 3200s but they seem like they die in less then half the time of the 3700's. guess that's what i get for buying more expensive cells in usa, the cheap china ones out perform them for less coin