You may have difficulties with the choice of a CPU, you will solve them by looking at detailed test Intel Core i7-8665U Cinebench r23 score single and multi core and understand is it a good processor or a bad one to buy, how powerful is this CPU. Here is useful information from Cinebench r23 benchmark. A thorough analysis of all the specifications, so that it can be easier to understand, is summarized in the table. After reading the results this test and video, you can already make an informed decision about do you need to buy Intel Core i7-8665U or not.
All the figures in the article above do not mean that you should be guided entirely by them and trust a simple quantitative comparison. Better to watch the testing video and read the opinion of of people who bought Intel Core i7-8665U before making a selection buy this CPU or not.