I have ridden the San Marco Composite, and it was too skinny and it was more like a bar that jammed up your rear. On the other hand, I used to have a selle italia flite, but switched to the SLR Carbon (88 g on my scale) and it is 100% more comfortable than the flite i had. it just "fits". Hope this helps.....might consider this saddle as well. Ive ridden it on 4 and 5 hr rides before and never felt uncomfortable or sore afterwards, as the flite i did feel uncomfortable sometimes.