I never really know what to listen for with compressors either, but I'm really enjoying the Glue so far.
Completely possible that it's all in my head and that there isn't really a significant difference between them, but even so, that's fine by me. I've been enjoying it a lot, and it's nice to have options
If there's one thing I definitely like about it that the native Compressor doesn't have, it's the Range parameter. It perfectly addresses the #1 problem I run into with compression, which is how flat and anemic things end up feeling due to peak loss.
I don't even know exactly what it's doing - like, if I had to articulate it to someone, I couldn't really come up with a meaningful description beyond the "it lets some peaks through/reduces the compression", but I like how it sounds and that's good enough for me