The key here is that when towing (as opposed to going downhill) you can put much more energy into the motor generators per mile than is required to drive a mile. Due to charge/discharge losses, for your example this would have to be > 4x the amount. This obviously assumes the EV can regen at high sustained rates and you have a powerful tow vehicle.

So yes, you're right. The energy/distance argument should be one and the same.