I buy a Yamaha nearly 1 year lar.
I can't hear any different. since I'm not an expert.
but my friend's son learning grade 3. he said a little bit different when pressing it. I don't know true or not.
but for my son. he absolutely don't know the difference.
I buy this because it's smaller than the real piano. since my dinning room is small. I found it's good.