A comparison of various North American specimens shows that they fall into three groups, one an Early Archaic Great Lakes and Plains group, one a Middle Archaic Plains group, and a Great Basin, Pacific Coast and Nebraska group.

Of the specimens used, only one is similar to modern Americans that were compared to these skulls. The early North Americans are closest to European, East Asian and to Polynesian populations. Except perhaps Swanson Lake, the early North Americans compared do not seem to show a relationship to Africa or to the southwest Pacific (unlike the early South Americans).

The two Plains middle Archaic specimens (Turin and Medicine Crow) show no close resemblance to Native Americans, and certainly not to modern Plains Indians.

The Wet Gravel male has similarities to Blackfoot, Arikara, Sioux, Pawnee and Ponca Native Americans.

Turin has similarities to Egyptians, Norse, Peuvians, Santa Cruz and Tasmanians.

The Wet Gravel Female has similarities to Hainan, southern Japan, Anyang, northern Japan and Tolai.

Wizards Beach has similarities to Norse, Peruvians, Santa Cruz, Sioux and Blackfoot.

Prospect has similarities to Berg, Sioux, Arikara, Pawnee and Ainu.

Medicine Crow has similarities to northern Japan, Ainu, Moriori, the Philipp and Mokapu.

Swanson Lake has similarities to Santa Cruz, southern Japan, Tolai, north Japan and Ainu.

Spirit Cave has similarities to Norse, Blackfoot, Peruvians, Zalavar and Ainu.

Pelican Rapids has similarities to Moriori, Norse, Ainu, Pawnee and southern Japan.

Lime Creek has similarties to northern Japan, southern Japan, Eskimo, Ainu and Norse.

Browns Valley has similarities to Moriori, Mokapu, Arikara, Easter Island and Pawnee.