The problem with kbin is that the project maintainer was leaving PRs to rot for months. Even things like PRs to update dependencies for security patches weren’t getting updated. The community-based one looks to resolve that by running by simple consensus.
I’m not sure I agree that’s a good idea, giving full governance to the community like that, but since Kbin’s development has slowed, and the app itself has proven itself to be less-than-desireable to maintain, this is a good chance at finding new direction.