I've never played piano but am doing research for a gift for my wife. I think just about anything I get will make her happy but want to get the best piano I can for various reasons. In doing research and visiting stores it seems that I can get the low-end Clavinova (CLP-320) for $1400-$1500. This is comparable in price to the YDP223 which seems to be the high end of the YDP line. They both seem to sound great but can someone tell me about the action?
There is confusion because Yamaha uses imprecise terms in it's marketing. They however do not use imprecise terms in theeir spare parts database. Look there for exact answers
If you really want to know what parts are inside. Look at the exploded parts diagrams on Yamaha's service web site. As an example you can see that the CLP220 uses the "ABB K8 CLP150" keyboard. The Yamaha P155 uses the "K8 CLP155" keys. The P155 is newer then the clavinova, so it gets the latest keys. But in marking speak they call both simply "GH"
On the parts site the key actions on the ydp223 and the p140 appear to be the same "K6" type
I think "GH" and "GHE" are generic terms that describe several different part numbers made over the years.
If you search around here you might be able to figure it out by noting which parts interchange between productshttps://www.yamaha24x7.com/yamahaOMS/
Be sure and look at other brands too. I liked Roland's high-end key action but my budget didn't.