WPC stands for wood - plastic - composite. It is a combination of wood fiber or wood filler and plastic, could be polyethylene, polypropylene, or polyvinyl chloride (PVC).
For SPC floors, the core consists of natural limestone powder, polyvinyl chloride, and stabilizers. In WPC vinyl floors, the core is made of recycled wood pulp and plastic composites. Both floors layers are completely waterproof. These two types of flooring are essentially the same makeup of layers.
Both are durable and stable, SPC is more durable and dense overall due to its limestone composition. Both work well in commercial interior spaces. WPC is softer and quieter underfoot, while SPC offers better resistance from scratches or dents.