I use karoake version myself. I started out because I had so many requests for songs that could not be done properly live
like uptown funk so I bought it and loaded it into my pa900
and learned how to play the whole song along with the track.
I played the changes and comped like I was part of the band.
It worked out so well that I now have over 200 tracks and I can play them all. It opened up a whole new world and It allows me to be more current if I need too. It also stretches my ability to play for a younger crowd and let's face it, Sometimes that is a gig saver. If I have too I can play them totally live but the younger crowd likes to hear it like the record. The more versatile you are the more jobs you can play.

Mel