Talked with yeti today and turns out I'm wrong about the yeti snowhawk ski being different that the regular yeti ski. They are the same ski they just made it less aggressive with the special mounting for the snowhawk. So, I'll be trying that ski on my mototrax too, just need to buy the other mount. He didn't know if the best option for mototrax is the "for timbersled" version or the "for yeti" version but the differences are in the rubber bumper only.
Before you waste your money on a different ski check out the the trail of the one you have