Small Charms are: 3/20/20
Large Charms are 6/??/??
Grand Charms are 10/76/45
What do the large charms roll? And it looks like the large charms might be better for obtaining more attack rating and keeping the same max damage as a 3/20/20s would give you. If that's the case.. wouldn't large charms be slightly better for zeal vs zeal at the expense sacrificing a small amount of life?