The Godfather: Part II over Bride Of Frankenstein 8-5
The Empire Strikes Back over O Lucky Man! 2-1 It's about time that damn film got knocked off. I was starting to think it was going to make it all the way with those 1-0 victories.
Now we have a true battle of the titans for the FINAL
Looking back at the master list, the only titles I'd rate as improvements (from the ones I've seen, about 50%) are Bride of Frankenstein, TESB above, and The Golden Voyage of Sinbad. Aliens and Trek II I also like better, but that's a matter of preferred genre not filmmaking.
Surprised that "Frankenstein Must be Destroyed" didn't make the list - head and shoulders over the other Hammer Frankensteins (I suppose though you were looking at the first sequels).