Take the Latest episode. They proved the IRA's assault rifle was un-reliable and jammed, yet they still gave it the edge.
Also, they are only taking into account the gear, not the tactics, of each group.
I was annoyed as all heck when they gave the edge to the Spetnatz ballistic knife over the GReen Barrettes E-tool. Ballistic knife will drop one opponent at range, then is use less. E-tool will drop as many as gets in range. adn canm be thrown with deadly accuracy and force. I did it all the time with my old one. but it got stolen.