well you would think so, but I just replaced some old Conti GP4000 (@100psi) on my Alu Cannondale (which is as rigid as a very rigid thing indeed) with some brand new Conti 4 Seasons (@110psi) and the ride with the new tyres is amazingingly smooth by contrast – just my 2p worth, dont know what others tthink
not to say I wouldn’t also like a carbon Cannondale like yours