All the pictures really show is how much blood leaked between the rib cage and the hide. They aren’t really showing much of the actual damage. It’s plausible to assume that the buck bled more because he sustained more damage to lung tissue due to quartering away and really having a large portion of both lungs hit, while the doe was hit mostly in the front portions of the lungs. It’s also plausible that even if they bled similarly that the shoulders of the doe kept more of the blood in the chest cavity and allowed less of it to get between the hide and the meat. Without pictures of lungs, or big blown up pieces of meat, it’s really hard to tell that they bullets really performed any differently.
As far as the buck dropping instantly and the doe kicking, you said that the bullet in the buck lodged in front of the opposite shoulder. You can see that the doe was hit mid shoulder and it exited farther back behind the armpit of the opposite shoulder. My understanding has always been that the autonomic nervous plexus was slightly forward of the humerus. After looking at a few diagrams, I’m slightly less clear on exactly where it is, and there is more than one, but the brachial nervous plexus is probably the one if primary interest to hunters.(good thing I don’t shoot for it) I do not believe that you have to put the base of your bullet through it to put the lights out though. Some bullet fragments, or even damage from the temporary stretch cavity would probably do it. With the bullet stopping forward of the back shoulder on the back, my guess would be that is the reason for his seemingly instant death. What your doe did is what I tend to get with a double lung using Bergers. Instant drop, very short time frame before death.