sound overal will always be subjective but accuracy of sound is not. A sax that is reblown everytime a note is played does not "accurately reflect hopw a sax is played" Doesnt matter how good the original sample is. subtle nuances like continued blowed notes that blend into each other like a real sax is far more accurate than how korg do it. Notes that fall off naturally just as a sax player would and the ability to over blow a note are elemnets of the SA voicing technology that no other manufaturer has replicated yet.

There was a simply astoundind demo done by Peter Baartam

I cant find the link to it but click on this link and listen to the SA voices
http://aux.music.yamaha.com/tyros2/

Then go on this link and listen to the same family RX voices
http://www.korgpa.com/pa_root/en/products/pa2x_demo.html?en

Dont compare bthe quality of tyhe recording. compare the natural behaviour of the real instrument that both keyboards are trying to mimick