The two tenor saxophones are indeed clearly different, but the first (T4) one seems to be a "breathy sax", the second one a "hard sax", so did they really compare the equivalent voices?
The grand pianos only have minimal differences IMO, I'm sure they both use the same CFIII sample already used in the Motif XS and MOX, it has the typical bright sound. I heard considerable improvements in the church organ and some guitars.