To complement the worst thread. Guess I'll start with:
Dredd (2012) > Judge Dredd (1995)
The Thing (1981) > The Thing From Another World (1951)
Oceans 11 (2001) > Oceans 11 (1960)
True Grit (2010) > True Grit (1969)
The Fly (1986) > The Fly (50's Version)