Why is the Dmr, stronger than the Br?

I am confused to understand why the Dmr overpowers the br. I had big expectations for my most favorite weopon, in the halo franchise. I was sad and disappointed to see that it was actually one of the most underrated gun in halo 4. Everytime i join a game, everyone happens to use the dmr, but me and rarely one or two people.

Well the DMR statistically speaking is stronger as it beats the BR by tenths of a second 343 needs to patch this as the DMR has been the main riffle in the field in most games the BR is strong but the DMR beats it on all fields.

I find the Br is best for 4v4 and the DMR is best for BTb or any games on Complex. The BR is more of a weapon for close to mid range. DMR is long range. Its kinda coo that we now have two primary weapons to pick from. The Light Rifle and the Carbine however need to be beefed up just a tad.