Road Cycling“It is by riding a bicycle that you learn the contours of a country best, since you have to sweat up the hills and coast down them. Thus you remember them as they actually are, while in a motor car only a high hill impresses you, and you have no such accurate remembrance of country you have driven through as you gain by riding a bicycle.” -- Ernest Hemingway
I dunno, only have one Prologo saddle sitting in the pile of extra saddles... But there is a good explanation of the types of Prologo saddles at this webpage: https://www.bikyle.com/tech_info.htm