PSR-S910 voices:
678 Voices +
28 Drum/SFX Kits +
480
XG Voices + GM2 + GS (for GS Song Playback)
38 Super Articulation Voices,
18 Mega Voices,
24 Sweet! Voices,
46 Cool! Voices,
29 Live! Voices,
10 Organ Flutes!
PSR-S950 Voices:
786 +
33 Drum/SFX Kits +
480 XG + GM2 + GS (for GS Song Playback)
62 Super Articulation, (24 more than PSR-S910)
23 Mega Voices, (5 more than PSR-S910)
27 Sweet! Voices, (3 more than PSR-S910)
64 Cool! Voices, (18 more than PSR-S910)
39 Live! Voices, (10 more than PSR-S910)
20 Organ Flutes (10 more than PSR-S910)
And the Data List does have the Real Drums, but the special choir voices from the T4 are missing as well as the SA2 Voices from the T4.