I cannot comment on Vista 100, though I do have experience with Vista 200 (or private label versions) and have some in the fridge. Very generally speaking, Agfa colour films have slightly more pronounced grain than Kodak or Fuji, but a different colour balance and tonality. It's a tradeoff, and I tend to like Agfa's vision of the world. But at 100 speed, I am pleased with all of them, especially Reala 100 and Portra 160. I know the latter is not 100 speed, but it looks like it to me!