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.
Out here in Colorado, and in the units that I haunt, it is a tricky game to figure out how far to pack in on a rifle hunt. You want to get away from the masses that have moved game away from the roads but might want to stay close enough that you are taking advantage of the animals forced movements. There is no universal distance but I like the 1.5 to 4 mile range for day hunts where I am not planning on bivying out. This keeps you in that productive buffer zone where the animals are really...