Well there's a pretty good price difference but there is a pretty good power difference to, so I am told. I have not yet owned the HH 250 but have owned other 250's of both the CN250 and the CFMoto flavor. Both of them would outrun any of our 150's. If you take a look at some of the vids on our you tube channel at
http://www.youtube.com/buggymasters you can see the difference via a few drag races.
On the other hand, I drove an early 2005 Kinroad that I am confident that my Helix would outrun. If possible, drive both and then make your decision.