Help to understand "mirror" game setup

[OWL]

Personally, i think the "best" result you get when you play on the same map and with the same parameters. However let the selection of the units free so you will be surprised by your opponent using a massive armored attack force in a quick flanking manoeuvre while using self a heavy infantry force sneaking through the wooded area's of the map. Using different maps will never be creating the same conditions, because every map is different and will give one of the players a better position.

OWL