Ha ha, the main idea is to win outright (and not to feed CPs to the enemy). However I totally agree with Yauz's post...I think Yauz you haven't taken into account what if PE starts using armored cars or wehr uses ostwind. A loss is still going to be a loss.
That doesn't enter the equation because that is a specific infantry counter and has counters of its own in the game. You aren't taking into account AT guns etc... As long as you only lose 3 conscripts per gren you kill you'll still be equal in terms of CP experience.