It also has superior TIS and superior magnification optics for gunners and TC (="better eyes"), is more silent (high frequency does not carry as far through the air as low rumbling Diesel), it has a serious punch to deliver, better secondary armament than the Leo, and is very well protected. Its not all bad with american tanks, you know.
There is a reason why comparable generations of Abrams and Leopard 2 are seen usually as roughly equal. Plus American crews often have real combat experience, and their command staff is excellently trained.