Nah that specs are just for show only. There are only 3 version at this point. One version is international and it does not contain the AWS band for both 3G and LTE. If you search around other region, you will find that it is same specs for some region. One version is N/A version which consist of AT&T and Rogers. At this point, only Rogers device has been confirmed to have AWS band for both 3G and LTE. AT&T is only speculation because we won't know for sure until someone get it unlock which probably 3 more months, and then it is based on what firmware that device has been flashed.
So the specs that they show are all the bands that S4 can support, but they can disable some of them to accommodate the carrier of that particular region.