In my opinion these sleds/chassis are the best out there!!
The dragon's do work well, but when these sleds are set up right for the mountians they rock and are very light and agile. Then if you put some power under the hood it is even better. I think these are more stable compared to the dragon and they are more comfortable to ride and better riding position. In the deep powder again it does come down to set up but as far as the ones that I have done and others I have seen they go better and climb better in the powder, plus the lighter chassis makes a difference in the deep snow and another thing I see works very well is the stubbie nose it does not scoop snow and it does not push the snow when it is deep. I would choose the IQ racer chassis over any rmk IQ/raw chassis.