As reported by Charlie, sensored motors are designed under the same specs as detailed by ROAR. They may tweak them a little differently (you can adjust timing on LRP for example) to seperate themselves, but for the most part, they are all very similar. I have heard that the GTB/Neo motors and vice versa LRP/Velociti combos do very well. If one of your buddies has a motor of a different manufacturer that he isnt using, pop it in and take a swirl. Jot down a few notes and then put a motor in from the same brand of the ESC. It may be a bit time consuming, but it'll bode well for you in the long run......
R40-Pondering a new Red Dot
Hara Pro4-GTB/3.5/Max Amps-yea.
Pondering moving on to Xray-have to go with a winner. If you cant beat em, join em!
I gear to run and win, not to THERMAL!