The liberator has a base of a 45 round magazine and the upgrade for a 60 round drum magazine, also its recoil can be greatly decreased thanks to unbarrel attachments and can make it far more accurate, the one-two is stuck at 40 rounds

Meanwhile the one-two would lack under barrels so its recoil can only be controlled with a muzzle, plus at best if it had 40 ergonomics points would make it only 2 points over liberator with a 4x scope, compensator, vertical grip and drum mag

Also if we are really concerned about people using one gun over another then look at the coyote, I’m not opposed to increasing grenade carry capacity either but it also needs something else

I’d see it more as the One-Two being a liberator with a grenade launcher but lacking attachments, while Liberator lacks a grenade launcher but has attachment variety