since 2002 to MX Chris has used "New york concert grand (or Akoustik piano)" and "The Giant" from Kontakt, Native instruments, actually "Kawai Mp9000" is doesnt used by Chris.
The new york concert grand is used for all the songs on live shows and The Giant is used to play "Clocks".
If you compare the sounds of "new york concert and the giant" with the chris piano sound are the same.
The songs recorded on studio version, Chris doesnt use the NY and TG.
Example: The piano that you listen on "paradise" and "Lost?" is the "Berlin concert grand".
Look this:
w.ww.youtube.com/watch?v=GveC6rBN9pU
(AROBTTH era)
w.ww.youtube.com/watch?v=xVONtQleonw
(X&Y era)
w.ww.youtube.com/watch?v=Y1x9Gb6oDlY
(Viva era)
w.ww.youtube.com/watch?v=C_hWU_Ju6hs
w.ww.youtube.com/watch?v=6QrfcHoZa5Y
(MX era)
w.ww.youtube.com/watch?v=R4YTog-hOgU
(The giant)
(Delete the dots in the links)
In all the videos are the same piano sound, except clocks.
Download this piano sounds and test them.
:)