I heard the CP88 piano as sounding a bit synthetic , like I initially commented on in the videos. However just like you mentioned and giving it the benefit of the doubt- just with a short time playing it with phones, plus add it the extreme noise factor from the floor - I can't be 100% conclusive on it.
I hear the CP4 as having a less digital sound, a warmer tone in the middle for chords and lines. The new one had more presence in the top end for sure but I just didn't care as much for the overall tone. Again a short time on it, playing with phones (of questionable quality) with excessive background noise where I had to really strain to hear anything.
And I only played the piano, no EPs or other sounds.
Thanks for posting. I may not understand how manufacturers do things but aren't the CFX and Bosendorfer sounds in the CP88 the same as in the new AdavntGrande N1X that you liked much better. Are the sample sounds actually different? or just the speaker system you heard them through?
Curious how the feel of the CP88 keyboard was. According to Yamaha PR its the same or maybe even upgraded from the CP4 but maybe thats not correct.
The AvantGrande N1X may be nicer feel but the MSRP = $10,999 so a little too rich for my budget although it would look nice in my house.
And were you able to check out the Dexibells?