This is a subject that really should be addressed on the footjoy.com site, but as a FootJoy Ambassador and a member of the footjoy community, I will try to answer your question. I own two pair of the Flex shoes and absolutely love them and plan on adding another pair this fall to my rotation. They are a very popular shoe that seem to be a favorite in pro shops because they can wear them all day and then head out after work for a quick nine. The soles on the superlites are very similar to the Pro/SLs and are made more for on course wear and are also a very comfortable shoe. The flex seems to be the more popular of the two shoes. I think the question you would have to ask yourself is: Do I want a dual purpose shoe or one mainly for golf. The superlite has a one year warranty and a full rounded toe character, full fit across forefoot, standard instep and heel, where the flex does carry a warranty and also has a full rounded toe character, standard fit across forefoot and instep, with a slightly narrow heel. Added toe spring for athletic profile. I do think you can go wrong with either shoe.