The Falcon Heavy is an absurdly low-cost heavy lift rocket

Upon direct comparison, the cost disparities are sobering, proving that commercial development of large rockets likely represents the future of the industry.

The bottom line is that the Falcon Heavy is a more powerful rocket than the Delta IV Heavy, and by various measures the latter will probably soon cost the US government about five times as much. Put another way, the Department of Defense may have to pay half a billion dollars more for a single launch of certain military satellites on the Delta IV Heavy versus the Falcon Heavy.