Personal opinion ahead.
There not that much different in my mind. Both skate very well, both are more defensively inclined while still being able to produce some level of points, and both can be physical.
Skating = about equal, slight edge Schneider maybe but it's close
Physicality = Schneider (not that Barron will get pushed around)
Offense = Barron (better Slapshot)
Schneider is probably the safer option, in that even if he doesn't hit his full potential you could still end up with a big, good skating 3rd pair guy. But if both were to hit there full potential, I'd actually prefer Barron personally.
Thanks for sharing your thoughts, much appreciated.
From my limited viewings I'd say that Barron has better skating. His stride and mobility for his size is quite rare, especially for a RHS Dman. That said, where he has had issues (based on watching him in several preseason games) is with gap control defensively as well as with tracking his man in the DZ. He's generally pretty solid at stepping up at the blueline though, which is undoubtedly a trait that adheres to Colorado's style of play which involves forwards backchecking and Dmen squeezing the defensive blueline.
Barron is no slouch physically, and got suspended last year in junior for some big, but imo legal, hits. Schneider definitely has a clear edge in physicality though, and is more polished defensively.
I suspect that Vancouver fans are naturally more enamoured by Schneider given his better overall defensive and physical game, which would dovetail more naturally with Quinn Hughes, but I suspect that they're undervaluing Barron in relation to Schneider here, in the same way Avs fans (including myself) are guilty of preferring Helleson over Barron simply because a stable defensive guy is more of a need due to who else we have on D already, rather than basing the preference on each prospects quality in a vacuum.
Whatever the case, I'm pretty sure Canucks fans would end up being happy with either one of these RHD's if they acquired them as part of the return for Miller.