Now figure may be figures. I find all this interesting for my beginner edification.
Interestingly I played a 575 couple o' weeks ago and also the GF II on CA 67. The 575 felt lighter, more nimble for faster playing of notes, and the keys offering less resistance, to me it felt like that anyway. All in all I found it less hard work. The superficial view of the coins above would not paint that picture.
Often much of a deal is made of the static down weight on the yammies, on the models below the 585 anyway without the counter weights I gather, since it is rather high versus the dynamic down weight, so the story goes mostly I gather.
I suppose it may not be as authentic an action compared to an acoustic versus that of the grand feel in the Kawai, which simulates that whole thing better. I believe from reading here that is the argument often made for that.
Anyway I would a thought, an important point, for the coins it is the static
down weight that needs to be overcome to get the measurement, so that is what the figures are reflecting.
In turn, it seems to me, it says nothing about dynamic resistance, and that
is the resistance that one actually experiences when the key is in motion, which will be 99% of the time what you are fighting, the key resistance during motion
It's the old static
friction, as opposed to dynamic
friction argument, both are at work, but in practice what it feels like to me, the one you are fighting with is the latter ... and mostly defines how hard it is to work the keys .... seems to me. After all, to overcome the static component, it is a fraction of nothing, in real time anyway.
In any case CLP 575, I found it a very enjoyable action, it was light enough for me to play being used to my Casio. I found the static down weight no issue really, to put it in comparison, the difference between the static hump to overcome, and a letoff or escapement bump, the latter felt like much more of a noticeable effect since it is for a few degrees of the key travel where you can feel it getting in your way.
Now, also a big disclaimer, I got no clue about acoustic grand actions, and used to my Casio keys and of beginner status, so add some salt
With that out o' the way, summing up, when I think of it in terms how I put it above, why I think that difference in action between grand feel II and that of the yammies is what it is, and how I felt it, it all makes a little more sense to me, whatever the coins tell us, I believe it's only small part of the story.
The figures above would give the impression that the Kawai of Morodiene ( granted, it is GF 1, not GF 2 that I tried ) is lighter to play, but I did not not get that impression from the grand feel 2 CA67 sample versus the action in the CLP 545 and 575 I tried in the shop that day.
The letoff or escapement on the GF2 was much more severe than on the yammies too I noticed. I wouldn't be surprised if the key moved slowly with enough coins to just about overcome it, so it moves slowly enough, then I highly suspect on the Kawai especially it likely would stop on the escapement bump, and not go all the way down.