Gillette gave it to Shun and Aurora. It's a good post.

Aurora is good. Aurora adopts a more advanced 8-layer blade design, including 1 protective film, 5-layer ultra-fine wetting blade, 1 layer tight cutting sliding blade and 1 layer shaper. In addition, Aurora also uses FlexBall technology, which allows the cutter head to rotate freely on the facial curve, providing a more comfortable and soft shaving experience. However, because Gillette Shunzhi uses a fixed bit, compared with some products with adjustable bit, it may not be flexible enough in some details. The charging time is also longer.