The 2016 Senate at the 67" length is 7.043" at max width point, so nearly the same as the Omni. The 2015 Theory (last Theory made) in 67" length is 7.347" at max width point, so probably just a bit wider than the TX. Of course, width is just one factor in the design of a ski. It is probably more telling when comparing mid-level skis to know the manufacturer's recommended max speed than the particular width. The Senate is recommended for a max speed of 34mph while the Theory has a recommended max speed of 32mph. IIRC, the TX suggested max speed is 34mph, so more in line with the Senate. I think the CX also had a recommended max speed of 34mph, too, but I don't know for sure.