[Serum]

In large lines your theory is right; with two different KV motors, at the same voltage and geared for the same speed;

but there is one detail; the lower the KV of a motor, the higher the torque. (which is needed to pull the sled with the lower final ratio)

all and all the startup-burst in current a lower wind (higher KV) motor makes is relative higher than the startup of a higher wind (lower KV) motor. the internal resistance of a lower turn motor is higher than the higher turn one.

Artur (griffinru) made a motor calculator. those motors you mention are in his database.