I said this 3 or 4 years ago when I first got my dinosaur i30 and was ridiculed for it, and I know it's gonna happen again, but here goes.

I'm sure that it is the 8, 12 and 16 bar loops that make the Korg styles sound the way they do. Which to me seems more alive. At the end of the 8 bar loop on some of the variations there is a fill usually which livens things up without using the fill button. The same is true with the 12 and 16 bar loops. One big band style on each variation has a different amount of bars that loop.

Thus if the PSR only is capable of 4 bar loops and they can't be modified to accept the longer loops, I think it is useless to convert Korg to Yamaha. Now, Yamaha converted to Korg may be a different story. I really haven’t a clue about that aspect.

Of course I could be wrong but this is a suspicion I've had all along.