The PSR 3000 was pretty pretty much as close as possible to the Tyros1 when it came out... this will probably be the same case with the S900 to the T2. same kind of styles/sounds except the key feel/aftertouch and not as good DSPs...

I just hope the S900 introduces brand new styles that are not on the T2 like the PSR 3k did... and then we can just import them into our T2 and everyones a winner!!!