User blog comment:Alpha1ance/Race Weapon Proficiency/@comment-5193859-20130301232250

I notice a 5/10% difference, but mostly with single hit weapons like sniper rifles and shotguns.

Using the same weapon as a base, I notice how many hits it takes to take out the same enemy on same difficulty between characters that have 15% weapon damage passives and 20/25%.

With assault rifles it's really hard to notice the difference though, except with something like the Mattock or Saber.

On a Turian Soldier, getting an extra 5% on top of 37.5% in their passives would be noticable I think. It would also just be a cherry on top for me because I generally use the Phaeston on Turians anyway.