czar may float a bit better and charge better (more rocker, stiffer), However the Obsethed has more sidecut, sidewall construction and a rockered tail, making it much livelier. I have 179 obsetheds have skied at least 100 days on them and I fuckin love them.
The czar can be a bit of a pig to throw around and doesnt rail as well (less sidecut)...