That appears to be the same buck and the only thing I would say for sure is 3.5+. Aging in summertime is a guess at best and the angle of the buck in these two pics is dismal at best. Good buck, best of luck with him this fall.
For the bottom color pic, I would guess 4.5+ for the buck in the back and 3.5+ for the other two. With that said, I would not be surprised if all 3 bucks were 4.5+. Good group of bucks, best of luck with them.