Mostly, I think, Donner, with a splash of Lester. As in the Donner cut,
1. No H-bomb; the Hackensack rocket from the first movie breaks the Phantom Zone open (this scene will also be added to Superman 1 EOE)
2. Zod says "FREE!" when broken out of the Phantom Zone
3. Window and gun, not river and fire
4. No or extremely limited telekinesis
5. Non is more of a menace
6. No ice cream sight gag, I might use a couple, but not to the point of corniness
7. No wild goose chase around the Fortress
8. Marlon Brando
But a few scenes do work a bit better in Lester's cut, so I am making a hybrid cut of my own.