after multiple listens, new things get noticed:

Floyd's voice has a very distinct signature sound in his own songs... but on this song it sounds to me as though he adapted to Janice's style. If I didn't know from the credits that Floyd was singing backup, I wouldn't have caught it.

I assume this was a conscious decision on your part, Floyd, since you don't tend to approach projects randomly.

Personally, I think it is a highly desirable trait in a song to have harmonizing vocalists mirroring one another.