Over the years I have taken deer with 26 different kinds of broadheads (some are variations from the same manufacturer. For example a three blade head and/or a two blade or a four blade). Ranging in the size of the cut from 7/8" cut to in excess of 2".

To be honest I don't like either end of the extremes for various reasons. A deer hit in the right spot will bleed good with any reasonable size hole.

Obviously the larger the cut the better the chance of hitting arteries/vitals on a marginal hit. However even the "best" head in the world, can't make up for a poorly placed shot.