How can I make an informed choice if I have no idea what the differences are between films? That said, it looks like Superia Venus is an ISO 800 film only so that helps a bit. I guess Superia "Premium" must be better than regular ol' plane jane Superia.
Look at he film speeds. Then determine the saturation characteristics. I'm sure it's in the marketing or specs reports. Then pick one. Hint: why anyone would want a grainy 800 speed color negative film is beyond me. So that takes care of 1 of the 4.
Fujifilm's web sites barely acknowledge the existence of film (aside from Instax) so they are of no help. I shoot a lot at low light. There are not many options for film at high ISO so you take what you can get. One roll of Kodak Portra 800 was $17 the last time I was in Japan. I'll be shooting Fuji rather than pay that price.
Interesting, I can't find anything on Superia Premium. We were in Japan last Spring, and I used a lot of Superil in ISO 400. Price was good (for Japan) and quality is great.