If you did use Dragon Ball heroes would Zoom still win
Taking a quote from the Sonic vs Wally Q and A
“DC’s multiverse is also infinite, but is multi-dimensional, with some claims even putting it at infinitely dimensional. And each universe within the infinite multiverse is subject to an infinite number of alternate universes differentiated by branching timelines. So an infinity of infinity. This is known as the metaverse. This is all contained within the Bleed, below the Speed Force, as evidenced by Grant Morrison’s cosmology map. Here are some extra sources that explain it all in greater detail:
The Multiverse The Multiverse has infinite universes and each of these infinite universes contains infinite timelines.They are separated by the Bleed,
comicvine.gamespot.com
“
So the short answer is it might be closer, but Goku Black would proooooobably still lose. Even in Xenoverse/Heroes the most you can really argue for is multiversal+, with maybe 1 dimension on top of that with some levity(and it honestly takes waaaay more steps to get to that point than DC). DC’s multiverse is much larger in comparison and frankly Zoom would still be stronger if you decide to take dimensional tiering seriously, because of the bleed. Not to mention Zoom has far more “incalculable” speed feats than you can possibly argue for heroes(which has maybe one or two feats, which are contested).
By a research btw