
The particular edition I just finished in from 2006 and is described as "The author's uncut, uncensored version". I didn't remember enough to say what was different but there is an afterword that specifies the changes. The one change I remembered was the ending. Without giving any spoilers, the authors' preferred ending (the uncensored one) is much better and much more brutal. An unconventional horror tale needs an unconventional ending.
The bottom line is Ketchum's tasty (pun intended) novel of terror and cannibalism remains as gut-wrenching (yes, intended too) as it was in 1980. A horror classic.
P. S. This particular edition also has a short story titled "Winter Child". It works nicely as a epilogue to the Off Season universe. Ketchum has also written a sequel to Off Season titled Offspring but I have yet to find it