So long as you stay away from the gel version, the Vitesse will be firmer than the Butterfly, but not as hard as the Flite. Shape-wise, it is similar to the Flite. So if you like the shape of the Flite, but you want to go a little wider & a little softer without going too mushy, the Vitesse is probably the one.

Nanci made me laugh out loud about the hard-butt ride on the Zero. I tried the same vintage of that saddle, which was the year before the new claims of "now softer for '06". That was the only saddle I ever tried that I really had to stand up after every 10 minutes or so of pedalling just to make sure that my sit bones hadn't been ground away. The Zero & I parted company shortly afterwards.