funny and long story dude..
japanese wizard II neck is different than korean WII neck, not to mention indonesian/ china WII neck.
They can put the same dimension on the catalogue, but the fact is : they feel different.
for example : I used to had 4 korean RGs : RG270DX, RGR 220DX, RGR320 DX, and RG 320 DX QM. They all claimed as W II neck.
and guess what? none of them have same dimension and feel. One is thicker than others, one is smaller than others, one is faster than others...etc..
now come to japanese WII : RG 680 CM claimed as WII neck, as well as RGR580, I used to had them both too. The neck on RGR580 is the thickest of all WII neck I ever played! the neck on RG 680 Cm is narrower.
I can't blame it on the japanese craftmanship since these two are their domestic model, so they could have something different in the recipe.
so.. good luck on your quest for the W II neck, it might surprise you depends on what you found