I must admit the underseat on the C was not what sold it for me, i could take it or leave it...However having ridden the B for some distance the hard suspension was noticable (probably did not choose a good test route) and I never felt comfortable on the bike...kind of like I was perched on a fence. Once I sat on the C though it all fell into place.
I may retract that statement once I have ridden it back from the dealers today, which are 100 miles away ;D