The choice between the Vision 40W and 20W hinges on your specific needs. For high-efficiency cutting and thicker materials, the 40W module is your go-to. It effortlessly slices through 18mm cherry wood, 15mm dark opaque acrylic, and 0.1mm stainless steel in a single pass. But if precision engraving is your priority, the 20W module will be your best ally, thanks to its finer laser spot. It can neatly cut 10mm cherry wood, 8mm dark opaque acrylic, and 0.04mm stainless steel in one go.