It use the sound of the psr as far as I understand. Like impuls I am also not impressed with the demos of this software.
The official demos of our product are those on our homepage (43 recordings from a stock PSR S770, set to sound at its best, using the preset styles as supplied in the demo). I am sure among them you will recognize many style names which are on offer also on your Genos among the presets Yamaha gave you.
Make a recording of some of them and post your results here. Then everybody can click "play" and make an objective comparison.