It seems to be a bit of a common mis-conception that higher voltage = more insane power and speed, and it simply isnt the case. Higher voltage can mean that, certainly, but what it really means is a slower turning motor can be used that leads to longer run times, lower temps, and cheaper batteries. The only downside I can find is the need for more space on the chassis for batts maybe, and a higher voltage capable charger maybe too- no biggie.