I have a test Vitesse...but I only did 12 miles of stop-and-go with my cyclocross bike. Both have the cut-out channel and I really didn't notice any pressure with either. That is what I LOVE about the Arione Donna...no pressure, no pinching...just chafing on my right side, since I seem to sit lop-sided on both this saddle and my Jett 143. I'm now reasonably certain that it's a width issue. If Fizik came out with a wider version I'd snatch it up without a second thought.