Is there a big difference in size between Myrmecocystus navajo Navajo and M.mexicanus?

[Tetti]

I have wanted to grow a honey pot ant for a long time and I finally found a shop around me.But the species they sold was M.navajo, not M.mexicanus.I know Mexicanus is bigger than the Navajo, but is it noticeably different? If there is no significant difference in the size of the workers, I will raise the Navajo