Thanks so much for the response.
I went back and listened to the videos again, lining them up in separate tabs so I could compare setup to setup, and I agree there's a difference.
I'm having a harder time articulating what it is, though. I don't know how much PRS wants you doing this, but I'd love to hear your description as to what the difference is, between the single and doublecut, that you hear (I do hear the differences in the thin-line much more clearly).
I guess for me I'm confused because I had a clear preference for the sound of the doublecut in the linked video at the top of the thread, but in your videos I lean towards the single. My concern about the single would be that, like my SE Chris Robertson, it might feel a little too one-dimensional. I feel like that guitar wants to rock out - the same way a Porche isn't that happy unless you're driving fast, that guitar kind of overpowers some of the gentler stuff I play. I hear that same quality, some, in the shootout video - but not in your videos, where the singlecut doesn't feel overpowering but rather maybe warmer?
Just, you know, in these times when finding a guitar store with them in stock and trying them out in person isn't much of an option, trying to really understand the difference.