Crab Buggy
The best comparison I can give is ski vs. Snowboard : by changing the posture of the pilot, you get a completely different ride. As of today, after many years of the two products being on the market, you still see both of them on the snowy slopes. Some prefer skiing, some prefer snowboarding, and others will choose one or the other depending on their mood of the day. Olivier Suire
Check out the 2014 concept Olivier is working on