As mentioned, fit is key. Chassis are easier to adjust fit.
The big one too, and I haven't seen it mentioned, but fit changes based on shooting position. I find I adjust my Whiskey 3 while at a bench, vs prone. If I don't, it forces me in a awkward or incorrect shooting position. Standing, once again, new position.
This leads me to mention that many people shoot prone incorrectly. Correcting this often has massive improvements.
I enjoy my Whiskey 3 Gen 4 folder, and my buddies AX is nice. The difference here is the W3 can be shot with the pistol grip, or altered traditional fitting (Grip is very perpenduclar, but has a thumb rest, which I use)
My other buddy has a JAE, and regarding fit and finish, this one takes the cake, by far. Extremely well made with lots of well made and fit peices. The grip, while being more traditional, has an amazing texture.
At the end of the day, you just have to see what you like and go from there. All three of us like our stocks, but I think I'd sooner want the JAE vs the AI AX (actually by quite a bit), but I wouldnt want to give up my grip position for the shooting I do.
Boils down to opinion. The other stocks mentioned are all very good too.