I agree, you are correct good sir. Both SM and SCE are superhumans. Both are enhanced, one through science and one through magic, but on that front they are essentially the same. SM are the champions of the Emperor and SCE are the champions of Sigmar. Sigmar is the Emperor figure in AoS. They are pretty much the exact same thing. They are also both treated in the exact same way by GW. The second I laid eyes on the SCE (upon the release of AoS), I knew they would be getting the same preferential treatment that SM enjoy. There is a reason why they are nicknamed Sigmarines.