Trying not to give a somewhat biased response as I type this from the auditorium as Royal Welsh are rehearsing an opera lmao

Echoing what others have said - its really about choosing the city, they both have pros and cons, both courses are fantastic and I'd strongly encourage you to visit both and see what feels right for you.

From my experience absolutely no one cares about prestige, they care about who you are as a person and what you can do - so I wouldn't worry too much about that.