Dear friends...
On SD9PRO we have:
1) User Audio Drums (single audio files) like Audya, and new Folder User Audio Drums like Factory Audio Drums of Audya...
2) 700mb Ram... In Audya we had 64mb up to 256mb with expansion memory....
3)New Import (user) midi file sequences in Modeling Styles... Very good!!!
3) 128 recording bars in Style....
4) 6 Sounds for each Program Sound and 600 Program Sounds... In Audya we had up to 4 Sound for each Program and 320 Programs....
5) 600 internal Audio Drums and 450 Percussion Stereo Groove... In Audya we had 370 Audio Drums and 62 Grooves..
6) A huge Library with more than 100 new
Audio Live Guitars... In Audya we had 159.... If we have the old and the new 100 Audio Guitars, now we have 259 Audio Guitars...
7) Possibility to create new Drums Kit with Custom Stereo Wav Files...
8) Surround 5.1 Wav Karaoke file (with stems group) like SD7
9) LAUNCHPAD.... Not I understood very well however I think is very good....
10) Optional internal hard drive can be installed
(Type SATA 2/3_ 2.5”) 500giga or SSD up to 240giga... Good!!!!
11) DSP Effects.. Up to 10 programmable insert chains....
12) USB: 3 host + 1 device
13) Double player. Files recognized: Wav, Midi , Mp3, Mp4, Avi, Mov, Flv, Cdg, Jpg, Txt, Pdf...

And too more..... I think its very good....
If the SD9PRO its not the new flagship of Kerton, however its a very very good Arranger Keyboard...