I'm going to say 3...3.5 by November. Honestly it's tough from those photos. No visible sign of a paunch on either animal in those photos, flat backs, neck to brisket looks distinct. I'd like to see a head on shot of the brisket and a skylit profile of the head. Curiously it looks like the darker deer already has leaking tarsal glands. The lighter/redder buck's legs look proportional but the darker buck looks like he's still a bit lanky. Aging summer deer is tough. The rut will reveal all on these two.