Interesting observations so far. I guess if one wants a keyboard to sound like a Tyros then they have to get a Tyros.
I think really that the PSR2100 was designed to make you want a Tyros and no amount of tweeking and button pushing will ever accomplish that.
What I sense here is there should be a model smack dab in between the two. One where all the live play features and sounds are there but not all the rest of the gizmos.
I know I'd rather just play music than futz around with disks and buttons and menus. If I had wanted that I would have bought the Korg PA80 and a noose.
My two pesos.
Scott Langholff