@Romulus I really liked the tone of your second ending. The first, being a straight action scene, was paced ... well, like an action scene. Which is good, but I prefer long reads and greater detail. It was pretty interesting, finding out what happened to Charlie, why he started killing people and to what end, his relationship with Edwin ... and I liked the sad note it ended on.
It is satisfying, when a really bad guy gets put down, you know everyone's going to rest easy, and triumphant music starts playing, but there's something unrealistic about it, if that makes any sense. Maybe that's why I like bittersweet endings, they feel more natural. Either way, good job.