Yes, that's true (as did the X1), but the dedicated guitar effects give the edge to the Korg ... also the dual sequencer. Since a guitarist has no "hands on" time on the keys .... they need more auto options.
Just the way I see it. The SD1 also takes you OUT of the "monitor" game because they left out the speakers.
I am in NO way in love with the PA80, but for this scenario ..... I believe it to be the most complete choice.
These topics are not all about how it compares to the SD1. Sometimes, the SD1 is not even a consideration! (Like, with ME, for instance - sorry Danny Boy !)

Wish I was there for the Crab Fest, though !
(jealousy rears it's HUNGRY head !)