Sandman, not sure where you got your information, but ever since I left my M1000 and picked up a Mountain Horse I have found myself with more (or the same) range and the ability to get to nastier places on the bike. The pictures you posted look like easy street compared to the nasty terrain we ride here in NW Montana. While the bikes are not the toy to tackle turbo country with long chute pulls (only straight up with no other routes), I find myself waiting on sleds all day long.
As far as true timber extreme riding is concerned, the Horse's go more places than the sleds and are more fun. And before I bought my Horse I was about as hardcore snowmobile as possible (and still love them, but I have more fun on the Horse). One day I will have both in my garage, but the Horse will leave the stall 9 times out of 10.