Maybe I write a bit late, but after a few weeks ago, I had almost the same doubt ... CN34 or CA63, with starting budget for CN34 smile (and some other piano as well, but that's not important). As a long term user of "plastic keys - Yamaha s08) I was convinced that CN34 will stand for all. Until I tried CS6 (polished version of CA63). It was such a difference ... for just around 700Euros more. I almost bought that CS6 when the shop discounted also the new CA65. First I thought that there is just some unimportant difference between them, but (after advice from Kawai James) i tried them both and found that the differences are not just on paper. GF is just a step better than RM3 grand and it should be considered.
So, the conclusion is ... tomorrow I have a delivery of CA65 ... and can't wait for it smile

Kawai SK-2 ATX-4
Kawai K-300
Yamaha P-115