If you don't have room to swing a knife this size, then you probably don't have room to draw it from the sheath in the first place, unless you're wandering around with it in hand, expecting trouble ...? Swinging always takes longer than stabbing by virtue of the longer path of travel, but if you don't have room to swing then you probably also gain no advantage with the extra length of the B-III - if you can reach your target with one then you can do so with the other as well, and probably a much smaller blade also. The stabbing advantage of the B-III is the shape of the tip - it is narrower, allowing increased penetration depth on a stab of equal force. The GSO-10 is specifically designed without much of a point as that isn't its purpose. But that doesn't mean that it won't do the job. Skip to 3:18 where Guy uses his GSO-10 on the kevlar-clad dummy:
By the way, the GSO-10 is closely comparable to the Junglas, similar thickness and edge geometry and a few ounces lighter (maybe due to the Junglas' heavy coating).