You can go back to the lesson where the render settings are being set and compare. Most likely the answer is that you and Sascha have different computers. Seems like your render viewport has denoising on. It’s better to do a final render to really judge the quality. And remember, don’t worry about your results being exactly as the teacher in the video, you’ll always get different results and that is not bad. The point here is not to copy the results, but to learn how to how about it all for when you make your very own art.