I know there are obvious differences. Never owned a cat but had friends who had them They are however both domesticated PETS and have been for centuries. For some reason though double standards apply. people also have rabbits and pigs domesticated yet in America the ONLY domesticated pet allowed to roam free is the cat....except on Indian reservations you see ferel dogs and in other countries you see ferel dogs, pet chickens, pigs, etc...Onmly in America do we discriminate.
On a completely different point I do not see the attraction to having a pet that basically only comes "home" for the free meal. I mean indoor cats or or cats on leashes jump in your lap, rub against you , play with toys, etc and perhaps a roaming cat does as well but for how long....I mean If I had a ferel dog coming to me everyday for a meal I would grow attached to it and want to bond withg it and to protect it. I would not want to drive to work one morning and see it splattered on the side of the road.