Yeah, at the very least there should be some reason why this is the case. Not just slapped on the end with zero explanation.
Working on: Author Appeal | Sandbox | Troper WallI included them simply in terms of if their voice resembles their counterpart the most. The person who included the edits that Grey DeLisle is Stacey DePass' American counterpart and Kevin Michael Richardson being Martin Roach's American counterpart likely did it in terms of the types of characters they are known to play.
I would say if there is actual remarks on the matter by the people in question or significant overlap in their careers then it's a plausible statement to make. Numerous jokes were made that Steve Carell is the American counterpart to Ricky Gervais, even though The Office is their only connection and otherwise having very different careers it's those jokes that matter more. But a dartboard comparison of "Both have an Evil Sounds Deep voice" isn't enough.
Comics are just words and pictures. You can do anything with words and pictures.

Been going through creator pages. Found a ton of them who have an entry, if the creator is british or canadian, going "For his American Counterpart, see X" with X being some rando other actor.
I know about a decade ago we did a purge of those entries on voice actors page, but I can't find the OG thread so lets make a new one.
What's the point of those remarks? There's no context, how are two unrelated people "Counterparts". Who decides who is whose counterpart? Who'se the arbiter of who is who's counterpart, whatever that means.
Part of the reason I'm starting this thread is I asked a troper who kept adding those to stop, and they refused saying others do it.
For some examples (I've removed them but they are in the history):