The way I interpret it is this: The Ketron, Korg, Roland sound is more like you would walk into a club and hear a live band.
The Yamaha sound is what you would hear on a CD. Both are good, and all can probably be edited to sound like the others.
Some of the Tyros 2 styles got closer, but in my opinion not quite there.
If you get a chance, check out the bank of Live styles in the G70, or most anything from Ketron, for the best examples of "in your face".
DonM