Maybe you didn't understand what I said.
W and Y files are reasonably matched,no problem with that.
It's not that W file is -3db lower in the whole spectrum.
It's -3 db lower only in the zoomed area,there's more differences as well as you can see at the shape.
Is if is someone reduced the level between ~500-2000Hz in the W file in half.
That's a broader view before and after this freqs:
View attachment 278067
As you can see before ~500Hz is almost the same but after that...
It's not your mistake,the match was good,it's just that they sound different.