Spanish toops of "Division Azul" wear the same uniform than Heer troops, because they are included there (not in the Waffen SS as other volunteers).
Two differences: many of them (specially officials) wear a blue shirt under their jackets, as part of the "falangist" uniform used in the Spanish Civil War.
They also woven a shield worn on the upper right arms in their national colors of red/yellow/red surmounted by the title "ESPAÑA.".
Too difficult to melt Division Azul and Heer in the same scenario with different uniforms.
Ah!, we play guitars, not mandolines ...