I use these blades for years and can only say that there are very good results. I doubt whether one with even more blades need the next generation at all. However, a small flaw I have anyway if the hairs are longer, for example, after three days and you then shaved the blades lose heavily to sharpness, so it resist from time to time in the following shaves. But fortunately, you can get a three-day beard trim with these blades still, the successor model is already no longer possible because as the distance between the blades is so low that this always clogged. So for me there is absolutely no reason to change the product.
