|Jason II and Jason III comparison|
One of the biggest complaints of the Friday The 13th franchise is continuity- mostly how Jason changed from movie to movie. The easiest way to explain this is the fact that different special make-up effects artists had different ideas on how Jason should look. Double that up with the fact that the directors also had an idea how Jason should look and you have a recipe for change.
Some fans also go in greater detail with their own ideas how Jason changes with intricate time lines and absurd theories how Jason's face changed so drastically from one movie to another. The main complaints that I hear is Friday The 13th: Part II's Jason being drastically different than Friday The 13th: Part III's Jason. In a way it's true, Jason II has hair and Part III's is bald. In my opinion that is where the differences end. Without hair, Jason II actually looks almost identical to Jason III aside from a few minor details.
Oddly enough, I think that the difference between Jason III and Jason IV is very different- like light and day in some way although the same basic design and shape isn't dissimilar. I find that funny because Jason IV was supposed to be based on Jason I, just grown up and Jason I and Jason IV look like polar opposites. Most people either consider Jason IV or Jason VII the face of Jason- I don't, I think Jason III is by far the best design. Jason III looks more human, more real and the face is a better sculpt than Jason IV. I just feel like they tried too hard to make Jason IV to look gruesome and there's too much going on- he just looks silly.
Facts are that from Parts II to IV, which was 4 movie days, Jason changes are way too drastic. It's easy to accept Jason's change from Part II to Part III and even I to III since Jason III looks more like a grown up version of Jason I than Jason IV does- lost yet? I personally feel that Jason IV is the odd man out, he just looks too different and he changed WAY too much in a few (movie) days to accept.