This is not a movie, but a really fun find on Netflix.
There was a show very recently on Spike called Deadliest Warrior. The show compares and examines two different warrior types (examples: Shaolin Monk vs Maori Warrior, or Green Beret vs Spetznatz, Waffen SS vs Vietcong, Vlad the Impaler vs Sun Tsu, etc), examines their tactics and weapons using real practitioners, and then uses advanced computer simulation at the end to arrive at who was the best.
It is a very fun show to watch, and there are two seasons worth of episodes (the entire run of shows) on Netflix.
Highly recommended if you have an hour to "kill".