You have e-mail (and it's revealed in my profile now)
As I understood, Korg PA-800 guitar mode is for style-playing only (and sequencer I guess), there is no mention of solo playing in the manual.
Roland guitar mode should be recordable in sequencer, but cannot be used in styles.
If someone is good keyboard player, he will sound good no matter what keyboard he plays.
The point is that this very same player will sound to himself much better when playing on better keyboard.
Anyway, as I understood nobody here started "this back & forth mumbo jumbo mine is better then yours" it's just comparison of two arrangers from same manufacturer, with no offense to any other keyboard.