seriously? if the 105 comes down, it should do more damage in green, not a stuh being fired forward, the 105 is coming at a higher speed, a higher trajectory and much more explosive power...
You do know why a shaped/directional explosion is much more powerful than a general 360 degree explosion, right? In that case, if you compare an high arc one it would come down and deal an even spread in the whole zone, while a directional explosion will deal much more of that same force in the same direction causing more damage to any target in that path... Not that any of this matters really, while CoH does do direcitonal cover I doubt it accounts for directional blasts... I don't think any game does, lol.
Claymore is a good example of that,
if it was omnidirectional it would be less deadly.
If you were implying an HE shell having more speed = bigger explosion? Bitchplease, velocity has zero impact on the explosive force of a high arcing explosive such as a mortar, that is why the earlier panzer IV's were armed with short barrel low velocity guns, because with their primary role being HE and infartry support, high velocity was not needed. AP shells are the ones that rely on velocity for damage, hence why a longer barrel means better penetration in most cases, matters fuckall for HE really.
So yeah, you could basically drop it from the top of a building and get the same strength as if you fired it trough a howitzer... Unless it's a dud and you hit the tank commander in the head with it, then the howitzer fired one wins