Well, I guess the better question is: "what is your other 2/3s ?" and that could make the difference.
While the Alpha is a great assault rifle. IT IS A RIFLE!!! which means it's hard to hide, hard to deploy in close combat, requires 2 hands to operate, and makes a sound that says "CALL HTR NOW NOW NOW!!"
The Ingram, on the other hand, is 1 or 2 handed use (depending on your GM*), can be hidden more easily (to a rifle), but, does less damage.
I guess the question really is, "How Pink is your trenchcoat?"