Who wins?
No comment.
But here's some perspective for the Marvel side for you eager bodies.
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MJJ:
No one ever defeated him except for his anti-Jaspers plot device, the Fury.
Let's see ...
238 MJJ (the far weaker version) warped his entire Universe,
his warp was so powerful, that to this day,
that Universe was the most retrograde
of all the worlds across the inter-dimensional continuum.
Even Matrix/Merlyn's power was thwarted by 238 Jaspers warp.
Matrix/Merlyn,
who was a true absolute Omniversal power over Space/Time on a ridiculous scale.
So to save us time ...
616 Jaspers >>> 238 Jaspers according to the story, and official Handbooks.
Besides overwhelming the 616 Universe with his warp,
Cobweb, who is psychically linked to her Future and Past selves,
connected to a possible Future self, and SAW 616 Jaspers warping the entire Omniverse,
had the Fury NOT stopped Jaspers.
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Magus
Magus with the Incomplete IG:
Magus merged the 616 Universe with a duplicate 616 Universe in an instant.
Magus stomped the energies of the cosmic Space/Time erasing Ultimate Nullifier.
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HOM Wanda (a God)
Warped the entire 616 Reality into her mutant paradise.
Wanda's power morphed the entire Omniverse, tearing it to pieces.
Wanda then subconsciously put it all back with a thought.
Wanda boosted the power of others, like Xavier,
and boosting Genis to his potential who blinked the Universe in and out of existence.
She even tried to create her own plot device, Layla Miller.
Wanda nullified the Mutant Gene from 90% of it's population across all Timelines.
Even a divergent HOM Wanda had the power to warp all the Earths in all the Universes.
Roma stated that perhaps even the "Ascension" itself would fall to Wanda's power.
To this day, I have no idea what that means, but it sounds bad ass.