Perhaps you can't decide which CPU to buy, you can make a decision by looking at the AMD Ryzen 7 4800U Cinebench r20 score multi and single core test and understand is it a good processor or a bad one to buy, how powerful is this processor. Here is all information from Cinebench r20 benchmark. A step-by-step analysis of all the technical characteristics, to make it easier to read, is summarized in the table. After looking at the data of all test and video, you already be able to figure out do you need to buy AMD Ryzen 7 4800U or not.
The summary data in the text above do not mean that taking them into account you should entirely trust a simple quantitative comparison. Better to watch benchmarks video and read the opinion of real owners of AMD Ryzen 7 4800U before making a choice buy this CPU or not.