"Created He Them" has the most interesting but relatable concept, I think. It is, of course, enmeshed in 1950s morality, since both of the characters would probably be much happier if they weren't forced to live together -- but that's the unspoken assumption that can't be challenged.

"Miss Quatro" is the most likable story of the bunch, I think.

(I tried to find some of the works of William Lee that I hadn't already read on Archive.org, but failed. I need to figure out a better search method.)