To muddle things further, I find Superia 200 and Reala 120 closest in saturation and contrast. Superia 100 is just too saturated and Superia 400 too contrasty. If anything, Superia 800 rated around ISO 500-640 always looked better in terms of grain and contrast than Superia 400.
Ektar has ramped up saturation and contrast and, to my eye, looks more like Kodak's dearly departed E100G. Reala kills it, though, as an all-purpose film and is great for portraits.