Actually, the difference is that US antitrust law won't go after companies who are friends of half the White House staff and pay off a decent chunk of Congress, whereas the EU doesn't care how big you are, they'll take you down.
Feel free to provide numerous examples of US companies avoiding anti-trust by paying off a decent chunk of Congress. You need to prove your assertions when they're that outlandish.
Microsoft, IBM, Standard Oil, American Tobacco, Alcoa. Several of the biggest companies in US history, all pursued very aggressively by the US Government on anti-trust. You're clearly wrong.
