New fella is indeed mighty handsome
Yeah, I have a porch dweller that I have been caring for now for the past two years. I was lucky, she is already fixed and ear tipped, thank GOD, because I know she would hate me if I trapped her. It took me about 6 months before she would let me barely touch her, and used to hiss at me when I first started feeding her. She has lived in my neighborhood for at least 5 years before I started caring for her....she wouldn't let me care for her before, I tried, but one day she gave in and took the food, and 2 years later, she sleeps by my front door. She, like your Mr. Kitty, is VERY territorial of her porch, and I have heard fighting on a few occasions when someone tried to come to her porch. But, she also knows when to step aside and not fight and last winter, a big orange cat (looked like your new fella) started trying to eat her food in the morning and started peeing by my front door, and she just stepped aside and knew not to mess with this big guy, who was 3 times her size. He was not neutered, and the lady at the end of my street was feeding him, along with 8 other cats, which I was not happy about. I know they are hungry, but if you are going to feed them, you have to make sure they are neutered or, as you know, there will be a constant stream of cats that will grow and grow until you have 20. Now, I feed Arwen, my feral girl, and I sit by her while she eats, and I pet her even (that took a LONG time before we got to that point), she is so spoiled that she will NOT eat her meals unless I pet her back the entire time. She is rotten. I think you are wise to think about trapping new kitty and get him neutered, because if he is not fixed, he is defintely going to tangle with Mr. Kitty. As much as I LOVE cats, I love my Arwen, so I don't feed other cats that come around, I have even chased a few off that were hassling her.....like the big orange guy. I felt so bad for him once though that I walked down the road way away from my house and gave him a piece of chicken to eat, but I didn't want to encourage him to show up at my door every day. Like I said, I LOVE cats, but I love Arwen so much, so I won't feed other cats in my yard. I would see though about trapping this new guy and who knows, maybe he will be tame enough once trapped to get adopted out, and if not, they can fix him, ear tip him, and put him back in your neighborhood, and maybe once he's fixed, he won't want to tangle with Mr. Kitty. I think you will have problems though if these two meet, for sure, I hate to say. Arwen never goes in my back yard, because I have a doberman, who, even though she is fine with my 3 indoor cats, she will chase cats that are in her yard (she wouldn't hurt them but she will chase).
Good luck with new kitty, and bless you for caring for Mr. Kitty, who even though he is still holding a grudge over you trapping him and fixing him, you know you saved his life and you still manage to love and care for the little turkey even though he is not nice to you, that makes you a really special person.