Perhaps you can't decide which processor to buy, you can make a decision by looking at the Intel Core i7-8086K Cinebench r20 score multi and single core test and decide how powerful is this processor, is it a good processor or a bad one to buy. Here is useful information from Cinebench r20 benchmark. A careful analysis of all the specifications, to make it easier to read, is summarized in the table. After looking at the data of joint test and video, you already be able to understand do you need to buy Intel Core i7-8086K or not.
The summary data that you have looked at here do not mean that taking them into account you should completely trust a simple quantitative comparison. Better to watch benchmarks video and read the reviews of real owners of Intel Core i7-8086K before deciding buy this CPU or not.