User blog comment:MilitaryBrat/The Basterds vs Brazilian Militia (MW2)/@comment-379205-20120111230939

Grenades: The M67 is faster to prepare and use than the Stielgranate. Edge: Militia
 * Melee: The Bowie Knife has a longer blade. Edge: Basterds
 * Handguns: The Walther is more controllable than the Desert Eagle, an thus can get off second shot quicker. Edge: Basterds
 * SMGs: The MP40 has a longer range than the MP5K, but the MP5K has a higher rate of fire. Edge: Even
 * LMGs: The RPD has a lower rate of fire than the MG42, and takes a 100 round belt, vs the MG42's 50 or 250 round belt. Assuming the MG42 has a 250 round belt, edge goes to the Basterds.

Somewhat surprisingly, while the Militia, has newer guns, they often chose the wrong guns for the task at has, namely an overly small, short range SMG (vs the full sized MP5 which has a 200 meter range) and stupidly overpowered handgun with too much recoil to make an effective weapon. For that reason, along with their superior training, I vote for the Basterds.