Castle vs Tacon vs Leopard motor review

For sure, my pics are pretty crappy. I tried to get a clean one of the interior, and couldn't get any to turn out. I thought the Castle windings were better organized. I'm not concerned about the wrapping of the rotor. The Castle's for sure looks the best, but I've seen other's that were similar to the Leopards. The Xerun is wrapped more like the Castle, and has that glazing over it, but it gave the overall cheapest feeling.

So I'd like some opinions on this. I have 3 E-revo's here. I am most interested in testing the 3 bigger motor's, but I do not have 3 MMM's to run them all on, Nor do I have 3 identical set's of tires, I do have 2 Xerun esc's, and 2 MMM esc's, and similarly sized tires. To keep things fair, should I individaully test each motor in my E-revo, with the exact same setup? Or do I run them all at the same time, with the differences, so they could all be ran in the same enviroment, racing against each other.