It's a pleasure to try and help to answer these honest questions that you have.
I did have an official tour round UWS, they spent hours and hours showing me everything, nearly everything I guess.
UWS felt like a place where massive investment has gone in, a couple of years ago - probably to renew Paisley
they are hands on, they train nurses - probably Scotland's biggest nurse training college.
Not sure if you will still be EU/Home fees covered by SAAS unless you are starting immediately this September, if you are, then just a simple 48 page SAAS form to fill-in! The accom on campus, or just across the street looked great.
glad to see that you dropped the highlands & islands, I got the feeling that that was not quite in the world's top 600 best universities - even though, to be fair, they surely do an impressive job teaching across all of the North, beyond the wall.
GCU never gave me an offer so I never got to study them.
Paisley did feel rather a lot like the (American sit-com version perhaps?, of an) American Community College. I'm sure I saw Chevy Chase, and Arbed, in one of the new teaching suites (they have non-parallel teaching rooms, with several bubbles of learning areas, with a tutor, hovering and circulating whilst all sorts of things happen) in my experience, I think that's a good way to learn, rather than Cambridge university's massive lecture hall with 700 students, being droned at by a faraway prof.
I got the feeling at Paisley that nobody ever failed, probably everyone passed everything (like "Community"), some might have got bored - if they could learn faster than the average. But, and I stress this might be important, the UWS staff were feeling quite vulnerable when I was there. The admin rented a posh hotel and had a very nice meeting, dinner, whilst decided how to cut budgets. This was according to the Scottish press, who were a bit excited at the time. So important things for you to check for GCU - staff satisfaction? Teaching methods? modern/antique? bored students ratio?
and, in the end, you'll probably simply teach yourself all that's needed for the audio. Buy an older MacBook Air, get a USB/thunderbolt MIDI system, use Garageband to get the basics. Maths, OK you need to know what is (zero decibels with respect to one milliwatt - if that works in audio) 0dBm in a 600 ohm system, and what is 6 dBs higher than that in power terms, , what is -40dB lower in voltage terms, and what is the program level volume of input to a broadcast stack, and how to phantom wire a mike. But it's all digital nowadays, presumably! And do all the above with AVID tools on a PC, I'm pretty sure that UWS hands out loaner PCs, as some Scottish students might not be able to afford one (debatable).
Does one of the two unis have a Campus FM radio station, as there's nothing like hands on practice to understand the lectures.
anyway, more research for you, and have fun! Scotland is nice