I think this might depend on how upright one rides. If I sit on my hand ( ) and lean slowly forward I can feel the change in area of sit bones that need support. I don't think the issue is just width. The saddles are shaped differently. The wider ones are sort of flatter and the B-17 begins to give a graceful curve to the nose and a Team Pro has an even greater downward sort of curve for the cheekbones aside the mid-section. I'm not sure I have the words right, but the saddle shapes account for riding angle as much as width.