The cruiser and generic AAA units in the first printing of Guadalcanal similarly got colour-switched. It made no difference for the AAA sculpts, since they were a generic common design, but in the case of the other unit the game had a Japanese-orange American-design Portland-class cruiser and an American-green Japanese-design Takao-class cruiser.
It’s too bad that the colour-switched green German and grey American infantry units are rare production errors, and thus aren’t widely available: they would be perfect for use in A&A Battle of the Bulge as house-ruled special units representing Otto Skorzeny’s disguised infiltration units.