The Admiral is definitely a bit lighter and more maneuverable in a treestand or ground blind, but the Captain may be a touch "deader" at the shot. I haven't yet shot them one right after the other, as my Admiral is out in my Jeep as I've been hunting almost every day, and my Captain is hanging in my shop. I've been shooting it across the basement mostly.
It's a tough call; I'm glad I've got both.