Tough choice, I would lean toward the Burris mostly because of the ballistic plex reticle being available. However Nikon has a new reticle that rivals the ballistic plex out this year. Price/Quality points on both should be similar.
I don't know either scope but consider eye relief when scoping a magnum caliber. Longer eye relief for the recoil. Most quality scopes have this covered already.
Nothing like a cut eyebrow if you have to get too close to see well.
As a Taxidermist I look at hundreds of Whitetail Bucks every year. I know that I have seen many different ways people judge the size of racks on live deer. I think for the most part they all are pretty close. I'm going to give you some measurements that I have noticed being right on in just about every deer. We have used it in the last couple years and have only been off by about 5-6 inches. We do study the deer while bowhunting so we get a little more time to look at them....