Which is better 9mm or 40 caliber?

Which is better- Spaghetti or Pizza? The .40 cal has more energy, and appears to be a higher "stopping power" round than the 9mm Parabellum. The 9mm has less recoil, and the ammunition is (generally) less expensive. You will find folks that can argue BOTH sides of this questions.

EDIT*

The .40 is generally preferred in combat situtations as it is significantly more powerful and is not too much bigger.