Would they both be of the same relative abilities? Why don't the Magne Ge have a bigger influence on Nirn? I don't see any direct worship outside of Magnus outside of the fact that the Looney tunes esque hole he left in Mundus allows magic to flow thru.
Neither technically took part in Creation but did the Magne Ge turn their back on Mundus forever when they saw what was required of them? Kind of like a "screw that place, it's wack yo!" (Literally how I imagine they talk, why not?).