No this won't happen. The SX series dose not have Suer articulation voices on it.
Huh?
Correction needed here.
My old S900 had Super Articulation sounds ...albeit only around 10 or so.
There is a difference between Super Articulation ...and Super Articulation 2 voices!
SX series , of course has S. Art voices. over 10x what my S900 had!
Genos series has S. Art 2 voices. (perhaps Tyros 4/5 also have these?)
These are not compatible...so if you don't have a Genos, you can't access any S. Art 2 type voices.
Also don't expect any firmware version to change this.
For the record, here are the main and best voices in the SX900:
252 S.Art!, 54 Mega Voices, 31 Sweet! Voices, 87 Cool! Voices, 131 Live! Voices, 24 Organ Flutes!