Well, I've used all 3, but haven't analyzed them intensively. My impression though, is that of the three, the Fujicolor has the coarsest grain, followed by Kodak, and then Superia. Kodak 200 has more muted color than Superia but I think the Fujicolor is about the same as Kodak. If I were to shoot a wedding and had to use one of the three Kodak would be my first choice. I would definitely go with the Superia for outdoor and landscape photos. The Fujicolor I would primarily use for home shots, or for testing cameras.
My opinions are my own. No persons nor animals were injured during the formation of my thoughts. Any resemblance between my thoughts and real thoughts are purely coincidence.