It is a de facto dry run. A single pulse unit (like that developed for Orion) with the tungsten shaped charge would take the place of the inert copper impactor--so pretty much the self-same craft could be used, and the warhead being about the same size.

So no Special Space Shuttle from Armageddon--no pulse spaceship like the Messiah from the movie DEEP IMPACT...

Just another Delta II.
(yawn).