Have to disagree Spalding, I have heard the Korg PA800 (The PA2x uses the same sound engine) side by side with the T2, both played by professional Artists, and I can assure you that the latest Korg sound engine easily matches Yamahas SA voices, and in many cases betters them.
Why, the answer is simple, the Korg sounds Real whereas the Yamaha SA sounds Impressive. (Big Difference)
TIP; always compare sounds against Real Instruments, NOT other boards.

Bill

BTW when compared to a Real Sax, (Side by Side) both are still lacking