We have those, and I think they are some of both, stray and feral. People move in and out of this part of town on a regular basis, sometimes leaving behind their cats and even their dogs.
We like having them come to our place for food, and I buy large bags of cat food for the strays. We have a dish and small beds on the front porch, and the cats come up and eat whenever they want to.
Some of the cats respond when I talk with them, and some have gotten used to my husband, who goes outside to smoke, and they will come up and eat or just relax, even when he is on the porch.
There is an empty field behind us, and a lot of wooded areas; so rats are living there. Now that we have cats in our yard and in Bobby’s shop, they seem to be catching the rats, and even scaring off the squirrels.
So, having them around seems to be a good thing for both us and for the stray cats.