Hello
I have found out that you really can't trust these demo's, unless it's a Yamaha demo. IMHO, Yamaha demo's sound like what you and I can do and sound like at home or on the gig.
I did not find that to be true of the Korg PA80/60, Technics KN2600, Technics KN7000 and the Roland. These are all fine instruments for the right person's and reason's, but their demo's are really beefed up, I think.
Best thing is to try it out in person with a 30 day trial period.
Best
Scott Langholff
http://www.ScottLMusic.com