Superman II had a slightly chequered history. Director Richard Donner shot it and Superman back to back, but after disagreements with the producers, he was replaced on the second movie by Richard Lester. Now, after much fan clamouring, he was given a chance to have another go and the results are now being shown in select cinemas/theaters and on DVD.
IGN has some clips from the new print so you can decide which version you like better. Actually, I think I like Lester’s version, but your mileage may vary.