which would draw more amps?

[BrianG]

^ +1.

While a good idea to keep amp draw in mind, a lot of people seem to get too hung up on it, but it's not as big deal as you'd think. For one thing, cars are "peaky"; they pull large currents for a short time, but the average is usually between 5-7x lower than the peak draw.

Any system will require X amount of power to get the speed you want in Y amount of time. Increase the weight, increase the speed, and/or lower the time to get that speed = more power. Power is volts X amps. Higher voltage means less amps for a given power.

That said, any similarly sized motor is capable of approximately the same power output. However, higher currents are not as efficient, so there are more voltage drop losses, not to mention requiring beefier batteries, wire, and ESC.