The best faction is based on an 1 extreme AI vs 1 extreme AI match on "Simois (2)". All factions were fighting against each other, but not against itself. This is a list which faction is the best in CoH:FEBFMF:
1. Panzer Elite 7 points
2. China 5 points
3. Britain and Axis 4 points
5. USA 2 points
6. Japan 0 points
7. Russian and Ostheer -11 points
If a faction has won a match then the faction gets 1 point if the numbers of own casualties are equal or higher than the enemy casualties. If the enemy casualties are nearly twice as large as the own casualties than they gain 2 points and so on.
For a detailed view of statistics you can download this "victory table.ods" file and open it with Excel or an equal program.