Interesting. Not sure what's going on with that. These fit the same as the UNCs for me, and are TTS. The fit might be slightly diff if I try on one of each, however, just wearing each of these on diff days, I don't notice any diff in fit. I think I'm lucky b/c 4s and Trainer 3s (aka SCs) fit me perfectly with no discomfort, while a lot of people complain about the pinky toe issue with these models. These are my two absolutely favorite silhouettes of all time, so definitely happy they fit me well.