[Traak]

AV rounds are more of the APFSDS type, drill through and kill anyone in the same vehicle compartment. No splash whatsoever, but instagib if infantry: cloakers, softies, RExos get hit directly. Less effect on soft vehicles, because they would drill a neat hole but not do much else. (even RPG rounds can pass right through skins of soft vehicles and not blow up in the real world).

AI rounds are HE and have big splash, and almost no effect on tanks, unless you scored a direct hit on a tread, but big effect on infantry and also big effect on soft-skinned vehicles.

An alternative would be a "beehive" round that would be like a massive shotgun, as used in Vietnam when hoardes of enemies were overrunning artillery positions.