Ray can also go into microverses. And he MIGHT have done it before Hank, I'm not sure who had microverses first between DC and Marvel. I know Ray was going into microverses by the time of Hawkman and the Atom, but Dr. Doom went to a microverse back in the early sixties.
The ultimate point though is that they can both use their powers to grow/shrink and grow/shrink the other, but only Ray's powers cause a death timer giving him a huge advantage.
Pic-related also makes Ray stomp unless they use the original defintion of the Marvel microverse seen in What-If where it's not one universe, its a series of universes you continually fall into as you cross each universe's planck limit.
I like this definition because it makes Micranauts really powerful and I'm a huge mark for Bill Mantlo stories.>>114660325
It's not fair. They were a top-seller until DC decided to fuck their continuity harder than Hawkman.>>114660367
VS Endevor from MHA in a custody battle.