There is a huge gap between feral cats and house only cats. Feral cats I've been around are wild, tough, and will tear you up. Our cats are completely tame, pampered, loved, etc. They just have more freedom, and have been taught by their mom to be mousers. They freely come in whenever they want to.
Last summer I was working on my laptop on the porch smoking my pipe. The male cat was hanging out watching hummingbirds. Two started doing their mating dance off the porch, and he went flying across and swatted both of them out of the air. He took a big roll, but they flew off. I laughed out loud at him. He glared at me for a minute, and went ripping off down in the meadow. 2 minutes later he came back with a live mouse. I swear he kept eye contact with me while he ripped it apart and ate it. Yep, you are a killer, buddy. And a lover. I love those kind of cats.