Olive oil less fattening than butter?

Olive oil is the loser in calories: olive oil vs butter, unfortunately 120 vs 100 calories per tablespoon.

So why is olive oil getting all this good PR. It's because it has healthy mono-unsaturated fat. You need some fat in your diet. It's better to go healthier with olive oil than butter which contains artery clogging saturated fat. Even olive oil should be used with a light hand, it's still a fat.

Source: HealthyStyle - Parade magazine 3/10