Bernie, I went from the S975 to a Sx900. Is there a big difference? No, but it is better, starting with the overall sound, it will cover a room much better.
Ed was at my house yesterday; he would be a good person to answer your question. He is using a S970 or a S975.
I love the playlist and registration work around, that is an improvement. Eight Registrations, style improvements. Easy to carry.
And there us more, John C.