@toby-pereira Right, that's what I'm saying. I should have been more clear.
Approval, STAR, Ranked Robin, Score, etc. all pass the Equality Criterion. The Equality Criterion is literally the test of One Person, One Vote, ie an equally weighted vote, according to the Supreme Court, but because you're voting for multiple candidates and you're literally casting multiple votes, it really doesn't seem like it.
The Approval pitch that "the candidate with the most votes wins" explicitly defines an Approval as a vote and states that each voter can cast multiple votes. (This makes Approval comply with Plurality laws, but not "vote for 1" laws.)
So, explaining why Approval does pass One Person, One Vote isn't easy, especially on the scale needed. In any case, it's absolutely something CES needs to get in front of.
In contrast, in STAR and RCV your vote ultimately only counts for one candidate, or as an abstention between the finalists. Oregon, South Carolina, and Pennsylvania all have constitutions that requite voters to only cast a vote for one candidate, so this is important legally.