Hi Cindy
I think the SA type voices were okay in styles but may not have given the same effect you could get playing live:
"The characteristics of SA2 Voices
(default vibrato setting and articulation
effects applied by the [ART] buttons) are
effective for real-time performance;
however, these effects may not be completely
reproduced when you play back
a Song which has been recorded using
SA2 Voices."
However, the mega voices were not appropriate for playing live and were more appropriate for styles.
"Because of the complex nature of these Voices and the precise velocities need to
play the sounds, they’re not intended for playing from the keyboard. They are,
however, very useful and convenient when creating MIDI data—especially when
you want to avoid using several different Voices just for a single instrument part."
The quotes are from the manual
Regards
Ed B