The downloads for both versions of Wotlk are the same.

Today, I had to reinstall World of Warcraft, and, when I downloaded the version of Wrath of the Lich King with the updated character models, these were the outdated, old ones.

So, in case I made a mistake and got the wrong version, I downloaded it again, but, it was, again, the wrong one.

I got suspicious, so, i tried to download the old version, and they were both the same, the same data and same size of file.

I think that, perhaps, the torrents got messed up, so it is impossible to get the new models.