RE: Help judging these bucks
Those all seem to be very impressive bucks.
A couple things to look for as to determining how large of a deer you are looking at from that distance.
check the antler width with by looking at the ears. If they are as wide as the ears...it's likely to be 18" I believe.
use the tip of the nose as a visual as well....the beams on a mature buck will come out about the same length as the nose is.
I look for tip to tip spread as well. If you're looking at a deer who is as wide as his ears...and his antler tips are only inches apart in the front...his beams are probably all of 26".
Nevertheless, the bucks in your pictures are definately awesome deer, and I don't think I'd hesitate on either of them.