I was never a fan of Superman, but lately I've began to read about the origin of the character and what he represents in pop-culture and realize the potential he possesses. Stuff like Superior and Irredeemable presenting different iterations of the character really intrigued me and now I'm really interested in the live action adaptations. Man of Steel really got me interested so I decided to check out the old ones. I know the Christopher Reeve editions are meant to be the pen-ultimate Superman movies, the first two at least.
I checked out the first movie recently, and I thought Reeve was very charismatic but the plot itself wasn't that impressive. Now I'm up for Superman 2 but realized there are two different versions, Lester cut and Donner cut. Which version is regarded as superior or canon? Are they VERY different from one another?