I took a close look at the motors that I have from Tidalforce to see if there were any obvious differences between them. I took a couple of pictures of the labels. See if you can tell the diff!
Here's the label on the standard 750 watt Tidalforce motor.
For comparison, here's the label on the 1000 watt or X version of the Tidalforce motor.
Hmmm, hard to tell the difference, no?