Under most circumstances discs work better. That said, i spend a lot of time commuting in snow, slush, and slop. So, in the winter, i actually prefer rim brakes (v brakes) because if they’re simple and reliable. In the slop, discs constantly squeal and need daily attention. Rim brakes just work. A quick swipe of the rims after each ride keeps them happy. For anything else, i discs are far superior—except for changing wheels quickly.