It would be interesting to know if anyone had actually done a comparison, take half a batch and treat them the same as much as you could. The same breed from the same hatch from the same flock, butcher at the same age, the same sex, feed them as similar as you can consider one free ranges and one doesn't, just try to keep everything you can the same except one group free ranges and the other does not. Cook them the same way. Brine or age them the same. Do enough samples so the average means something. Different individuals mature at different rates, especially males and their hormones, and that can make a lot of difference in texture and flavor even at the same age.
I have not done this at all so I can't speak from experience, though I have butchered a lot of cockerels and pullets, hens and roosters. I will give an opinion. If you can keep all other things even I think you will find in birds under 20 weeks that the texture of the meat is probably 95% and probably more due to age and less than 5% due to whether they free range or are kept confined. If you butcher one batch and find they area bit tougher than you want try butchering the next batch a few days younger.
The French have a recipe, Coq au Vin or Cock and Wine, that turns an old tough stringy rooster into a gourmet meal. A rooster a few years ole will be tougher and stringier than your hens. Your hens can certainly be cooked. The methods will 100% be determined by age whether they free range or not, any difference in free range versus confined will be negligible. I've never pressure cooked older birds but people I trust on here say the results are great. Those hens will be great in a crock pot, soup, or stew but the secrets are to use lots of liquid and cook them very slowly for a long time. A slight simmer is great but a roiling boil will cause them to be tough. Be slow and gentle. And expect those hens to have a log more fat than males of any age. For reasons related to laying eggs and potentially going broody whether they ever do or not, hens store a lot more fat than males. I generally cook the hen first so I can de-fat the liquid when making soup, then cook the veggies in that broth. The cooked meat gets added later.