Axis are tough to judge on the hoof, IMO, but I'd say the one in velvet is probably every bit of 32 and maybe bigger. I think the hard antlered deer may not be as big as 28-29. But neither of your guesses are more than 2" or so off.
Awesome deer. I'd guess your spot on with the velvet buck. I would call the hard antler one 26-27 but I have a hard time judging them on the hoof as well.