never used the core shorts, I have pro team, pro team thermal and classic, used the pro’s solidly for a 3 months touring trip and as well as the summer before and much use after, including a 24hr race, they are starting to fall apart. the classic’s seem a bit odd, the lycra is very different and the pad doesn’t feel as tight. the thermal ones are lovely, great for spring mornings. sizing is key i’m 6ft and 30″ waist but always get small
EDIT: the archive store sell, an archive short special which is the original pro team short, but only one length