@knc1: Funnily enough, I can see the KT2 one only on Amazon FR, not Amazon US ;p.
On the other hand, I have to resort to Google to even *get* to the US Kindle Software Update page

. Time to go to bed, I think ^^.
But it is indeed the exact same build, for once.
EDIT: Out for the KV too. Unified Wario firmwares, hurray!
EDITē: Well, unified in the sense that they happened to have the same build number. Not so much unified in the sense that they actually are completely identical in content...