Ok, first I thought this was an april-fools thread, but apparently the initial posts were older than that.
I'm not sure what you mean with the different names on the grip, there's two ways of holding a spear, one way for thowing it and one way for hand to hand combat. So I really thought this was a non-issue and hence the thread a joke.

I'll call this the M-grip for Missile

and this H-grip for hand-to-hand combat (I'll thus try to refrain from saying melee)
The M-grip enables you to throw the spear, in hand-to-hand however you'd be a dead idiot, pretty quickly. For one it's not possible to thust with the spear using this grip and a spear is a thusting weapon. You can stab, but as that makes the point follow the arch of your hand, stabbing is thus obviously an attack best suited for short weapons.
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