Help to understand "mirror" game setup

[Mike Abberton]

For mirror games using the same settings but different maps and kit, the idea, I think, is to balance potential Nationality bias by playing from both sides, but still allow for different playing styles (armor/infantry balance, towed guns vs self-propelled, choosing more green/regular troops or less veteran troops, etc.) with individual kit choices.

Some players get around the potential map variability of QBs, by loading the same pre-existing map for both QBs of the mirror.