@dostovel They definitely compliment each other, but one thing to remember is that neither of them add totally new functionality to Blender. Instead, they greatly speed up processes that you already have available. So if you find yourself beveling, mirroring, marking sharp, etc… then I would recommend HardOps, and if you constantly use cubes to cut things out with booleans, BoxCutter is great. If you want to only get one, I’d go for HardOps since it has more things you can do with it.
