As we can see, opinions will vary.
Some people love the SA Pianos, which don't appeal to me at all.
I was comparing some sounds on the T4 and I compared both the SA Concert Grand against the archaic basic XG Piano within the XG/GM category and they sounded identical which really surprised (and annoyed) me a little.
Just to make sure that I wasn't going mad, I did the same thing on the S950 comparing the Concert Grand Live! against the XG Piano and the results were the same.