I had an S950 in the past and it had 25 Audio styles but they are not the same ones found in the T5 for Genos download (as Genos does not natively have Audio Styles),

Those 25 audio styles are all found in the S970/S975 but with 15 additional ones.

For some reason Yamaha have separated the T5 and PSR S audio styles and deemed the PSR S ones better?? After all they are the ones on sale whereas the T5 ones are free downloads. Be that as it may, the T5 Audio styles are just as good in my opinion as the PSR S ones.... so its a little curious what Yamaha have done there, it's as if they just didn't know what to really do with them and eventually decided to flog a few to make a return then abandoned the rest and with it the idea of them completely which is a shame.