Hi, I'm swiss with a US bachelors diploma and good grade (4.0 GPA).
I see my future in Switzerland or Germany, and would love to get an MBA from either of these schools. Since the University of Illinois at Urbana Champaign and Boston University both offer affordable online MBAs, I would consider them too, besides the best local Uni (St. Gallen).

Now I don't have any clue how reputable both US schools are seen by european recruiters, and I wonder what the best choice would be. Of course, both are reputable schools in the US, but I have no idea if people here see their prestige in the same way. I'd prefer the online options because I could do them without commuting, but if the St. Gallen MBA is that much better in recruiters eyes, I would do that one preferably.

Does anyone have some insights into this?

St Gallen is absolutely the right choice if employment is your concern. It is arguably the most prestigious business school in the DACH region, with a powerful alumni network and a educational approach that is optimised for Swiss business realities.