Speed
The beam quality of the 20W and 30W lasers is less than 1.5M2, while that of the 50W laser is less than 1.8M2.
Raycus laser is a popular laser source brand used by many different laser cutter and engraver manufacturers. When you browse across the catalogs of various laser manufacturers, you will see Raycus mentioned in different places. It just means all these machines have a laser source made by Raycus Fiber Laser Technologies Co. Ltd.