Yamaha's digital piano sound one of the worst! Piano_ex, it will never fool anybody into believing it as a real piano! The only thing that made it more "real" is the their speaker system which is fortunately good. The reverberations gives a feeling of "realness". But the sound - sorry. Higher notes are always too tinkly. I don't know why Yamaha doesn't do an overhaul of their AWM or AWM2 piano sounds after all these years. No matter how they try (add in more velocity samples etc), it's still the same old thing. There is something inherently wrong with the sampling technique.
Roland is way more realistic than the Yamaha sound-wise. This goes beyond "personal preference". For any piano player, the difference is so obvious and the winner is so clear. Too bad Swee Lee doesn't bring in Roland digital uprights and grands. I've tried it in HK. There's just no competition. One doesn't have to go far - compare between the best they have (CP300 and RD700SX) or their best expansion boards, it's obvious which piano sound is better. Of course, Yahama's digital piano's touch still outclass Roland's (not surprising since Yamaha makes acoustic pianos), but once you go into the higher end digital grand, the touch difference between the two narrows considerably.
Well, for me, I've given up with hardware sounds long ago. Just got the 36 velocity/note Old Lady (Steinway D) from PMI. That completes my piano library - a simple upright piano, a 1923 Steinway D, a Bosendorfer 290 SE, a Malsmjo white grand, and a grand with no name recorded in a concert hall. From dark to bright for classical to jazz. Oh, actually, a Yamaha C7 will complete my collection.
Anyway, getting off topic again. But I feel I need to vent my frustrations on Yahama's digital piano sounds here since we're onto this...
. My elder had a good time though, she played her pieces in all the different programmed instructments. 
