First let me say that if one is going to compare 2 KBs, the voices used in EACH comparison should be the same, no? ... not organ on one KB and guitar on the other, or guitar on one and vibes on the other ...play the same melody with the same - or most similar - style, using the same voices ...
Second, I think some of the sax voices on the KORG are a little 'wanting'... I still think some of the sax voices on my kn6000 are better ...
All that being said, I to my ears the KORG sounded considerably better ... that could be my current KORG bias, but I don't think so ...