I firmed Glasgow last night (conditional) and put strathclyde as my insurance (unconditional) and I'm also Scottish. I know people who go to both and both have positives and negatives tbh.
I'd be wary of choosing because of cliques or whatever, you can get that anywhere really. Have you been to any open days? Which course looks like it would suit you better? That's what I based my decision on as even people I know who go there and have opinions may not have the same experience I do iykwim.