I have been looking at the non-quick charge 
and quick charge 
version of Archangel's Staff and I cant figure out what the difference is. Any help here? I am assuming the modification is the same for any other quick charge item. Is there reason to buy one over the other? They have slightly different gains, but they are same price.
Handy Sandy 3 votesYou can't buy one over the other because quick charge items are only available in certain game modes like ARAM. Quick charge items charge faster, like 
gives you stats every minute while 
gives you stacks every 40 seconds.
oSEXYPLATYPUSo3 votesquick charge is for alternative game mode maps where the passive or stacking of the item is FASTER then on the normal item on SR
Joseph Gladstone3 voteswith regular archangels you get 8 mana per mana usage, with quick charge you get 12. quick charge is only on maps like howling abyss, not on summoners rift, only the regular is on summoners rift, this is because aram is typically a faster mode
TheLastShadow451 votesThey have slightly different gains
That's it right there.