I know the Casio has some arranger functions it it, though not at the level of those Korgs (or even of the higher end Casios, like the MZ-X500). But the other issue is that the backing tracks have certain styles and instrumentation to them, and based on the sample videos you posted, you may be looking for something we in the west often ethnocentrically call "ethnic" or "world" music styles. Yamaha and Korg both make models specifically with those functions, even including the ability to use microtunings if need be (Korg PA600QT and PA700 Oriental; Yamaha PSR-A3000 and PSR-A5000). HIgher end models often also let you program in your own styles, if none of the supplied ones are appropriate. As I said, I don't really know what the limitations of the PX-S3000 are here (downloading the manuals might be a good start), but if your budget can swing it, I suspect you'll be happier if you aim higher. I think the PX-S3000 at its heart is still more a "piano with arranger features" than it is a true "arranger."