It seems to me that most of the time IV zones do things that I wouldn't put in any of those categories.
I definitely wouldn't actually put many of the Time IV zones in any of the other three times, but I think most of them do fit into the broad categories of score/draw/play.
Score cards: Age of Cats, Alien Contact, Space Age
Draw cards: Robot Uprising, Savagery
Play cards: Age of Cybernetics, Age of Toys, Communist Utopia, Warm Globe
All 3: Icy Wasteland
None of the above: Information Age, Mere Anarchy, Nanotech Wonderland, Nuclear Wasteland, Utopia, Steampunk Empire
Some of these are pretty subjective. Utopia technically draws a card. Steampunk Empire lets you discard a card for crowns, which is like scoring it. Anyway, the point is that the zones (and player cards) in the main set feel more homogenous to me than the expansion zones (and player cards). The Time IV zones are definitely the most interesting, but they're also the hardest to reach.
There are some cool zones in Times I through III: Cold War, Late Jurassic, Police State, and Primitive Paradise being personal favorites.