There are few films that area s far apart as XX and Vision 3. The former introduced in 1959 and essentially unchanged; the latter well into this century and is very advanced - visibly different and much more "natural" and "real" than even MP films from the late 90s.
I personally preferred Plus-X by far. Double-X can be pretty drab, although that might be partially D-96s fault (the standard MP developer). I'm investigating ways to improve it's rendition by changing the developer. The machine used in motion picture is quite limiting, however...
J