I'm about to buy new laptop but I am confused between AMD Ryzen and Intel CPU based on the quality.
Can you explain to me please ?
From all I can tell...do not buy laptop based on CPU alone. Look at all the features the laptop offers and the price you're paying to make a decision. Also look at reviews, they can be very important.
IMO, CPU quality is irrelevant as there are so many other variables mixed into how the laptop mfr. implements a design. For instance...some CPU's are super powerful but only get to showcase it for a few seconds before the laptop BIOS pulls back on clocks to assure a long life while keeping the battery small for lighter weight. On the other hand, a laptop that's fairly heavy with a bigger battery may let it's mid-powered CPU run at higher clocks longer, offering better sustained performance. Either laptop can be desireable, it depends on your useage.
Reviews will help you determine which design compromises a mfr. has made, and which makes more sense to your use case.