My default string for years has been D'Addario EXL, so I have a pretty well conditioned baseline sense of how they sound and respond. After putting some on PRS SE guitars, it seems to me that the PRS stock strings are a little brighter and more lively. I'm not surprised D'Addario makes PRS strings - it's a common arrangement - but are we sure they're identical to D'Ad EXLs? No difference at all?
I just got both the Classics and Signatures in various gauges, so I'll be able to test that. As the Signatures are twice the money, I'm going to assume they're not just re-packaged Classics.
There's a pair of videos with Paul and Brian Ewald (I think I got to them from the PRS site) both introducing the Signatures and talking about the Classics. My takeaway was that the Classics had been standard equipment on all PRS guitars "from the beginning" - but that Paul now likes the Signatures better, and I think he said they'd be using them on factory guitars. I didn't notice when the video was made. Does anyone know if they've transitioned to Signatures, and if so when they did it?