AYRT: Honestly, Foggy as Columbia undergrad is starting to grow on me. The show makes it clear that Foggy tends to like to stick with people/places. Maybe it's because he has taken up law with his law school roommate (and then fellow intern) in his old neighborhood (Hell's Kitchen), where he can identify the vast majority of people around him in the watering hole where the bartender knows him pretty well? (Sorry, that scene with Foggy and Karen at Josie's is so central to my conception of his character that I am still having trouble with another commenter who described it as something like "Foggy blows off Karen's concerns as having no validity." Wait, what?) So I can well believe that he went to Columbia for his undergrad and then stayed there all the way through law school. That's very in-character.

Whereas Matt... My headcanon is that Matt was wooed back to Hell's Kitchen by Foggy (just as Foggy attempted to portray the neighborhood in teh best possible light for Karen in the scene I was just talking about). He always wanted to be a lawyer for JUSTICE!, but it might not have been in Hell's Kitchen if he hadn't ended up with Foggy. Matt wants to prove that he's more than his disability, so doing that by not limiting himself to one area he knows well makes sense to me. Hence his different undergrad than grad school.

TL;DR: Foggy gets very committed to places (and people...), so him attending Columbia for his undergrad degree as well makes perfect sense. You're winning me over, anon.