I like Hiyori more. I don't know why, but she's just more interesting, especially in the story, and she is kind of unique as well. Also didn't particularly like Kofuku's ability, even though it came in handy occasionally, it was a pretty reckless ability and created problems. KInd of a boring goddess, too. Ebisu was a far more interesting God of Misfortune.

I feel that Kofuku has a bit more of a uniquely charming sense of depth that has simply yet to reveal itself. Hiyori is great too though, so it's a tough one.