It's a guess, but i would say the deer on the right would be at least 3 years old and in an age of some what maturity. Only real reason i say this his beeams appear quite long. However it can be alittle obscured by the left sides being so stunted.
Quick story, my neighbour shot a buck this year that had incredible mass, lots of junk and figured he was an old deer on his way down. I looked at the buck and immediately said he is young no more than 4 years, reasons: body size he dressed 200-225(that's small for mature bucks here), neck was symetrical, face markings point to a young deer, no nose drop and the rack had short beams only 17 1/2". The deer scored 188 nontypical(green) and was aged at 4 years old. Oh yeah a hell of a deer, but could have you imagined what that deer would have scored when his beams and tine length caught up with his mass....WOW. So I think beam length can be another way to tell the age.

As to the one on the left I would guess young, but the palmation he has is a bit deceiving...palmation can be genetics or injury in velvet, but often times signs of downward swing. I still will go with my gut and say 2!