My toms are always bigger in size than hens. It is VERY obvious with my 6 month olds due to the size and the difference in head wattles comparing the hens to toms, although I could tell around 4 months the difference in size too. I had a hen that developed a beard and started strutting like a tom at 1 year old, but recently read that a small percentage of hens in the wild, do develop beards, so its not that uncommon.
The toms feet are much thicker and larger (like a roos) but then I can always compare within breed and you have 2 separate breeds so I don't know if that's helpful.
Also, I find both toms and hens either friendly or distant depending on their moods. The springtime however is when your tom, if you have one, will really act up.