Joke - Difference between Balls and Guts?
GUTS - is arriving home late after a night out with the guys, being met by your wife with a broom, and having the guts to ask: "Are you still cleaning, or are you flying somewhere?"
BALLS - is coming home late after a night out with the guys, smelling of perfume and beer, lipstick on your collar, slapping your wife on the butt and having the balls to say: "You're next."
I hope this clears up any confusion on the definitions.
Medically speaking, there is no difference in the outcome since both ultimately result in death.