[Si Coe]

Well you could do all sort of fancy calculations and stuff, but its pretty pointless really because that data you have has no relation to a motors actual power band or how it operates under load (kV is a no load figure). Furthermore torque at the wheel relates not just to the torque effect of the motor, but also the gearing applied to it.
In theory a lower kV motor will have more torque, but since we would commonly give it a higher gearing to produce a similar top speed to a higher kV motor that benefit is lost.
The watts is the motors power, but its really just the electricity converted per second. Converted into what (no pun) is the question - you'd hope forward movement, but some is turned straight into heat. Power figures are no use with efficiency as well, telling you how much is converted into the form you want.