Well, the eternal question crops up again!|
As it happens, back in the dark ages, I did a GSMD audition (in front of Jim Gourlay, fast bit of the Arnold Fantasy that I made a hash of) and didn't get in....so I'm biased! I went to the RCM which was a fantastic training for the profession, both as a tuba player with John Jenkins but also as a musician (the two can easily be mutually exclusive). It comes down to style, I guess - talk to pupils of both Owen and Pat, and go with your gut feeling.
For a variety of illogical reasons, I'd go to the RCM, myself. Loved the place.