All I can say is the more I dig in and really play this Micro Arranger the more I like it...I got the S910 side by side and let me tell you the Micro can hold its own against the big guys sound & style wise, feature wise of course there's more on the Yammy but let's face it it 5x the price, the Micro has more then enough bells & whistles to enjoy playing also.....there is a difference in that the KORG sounds more Live like a real band vs the compressed tight CD sound of the Yamaha units...both are very good,just different. KORG did a nice job bringing out this MICRO line of instruments......