After listening to the samples on Amazon and comparing YLAMLAY to I Don't Know and CT, I'm thinking that it is the Japan remix. In the samples, the guitars are duller and the mix in general is duller in YLAMLAY than in I Don't Know and CT, just like the remix. On the 7" mix, the guitars and overall mix have the same high end, stereo separation, presence, and bite as I Don't Know and CT. Can't say 100% based on low-fi samples, but that's what it appears like.
We'll soon know for sure...