You may have difficulties with the choice of a CPU, you will solve them by looking at comprehensive test Intel Core i5-1240U Cinebench r15 score single and multi core and understand how powerful is this CPU, is it a good CPU or a bad one to buy. Here is useful information from Cinebench r15 benchmark. A thorough analysis of all the technical characteristics, so that it can be easier to read, is summarized in the table. After reading the results of parallel test and video, you can already make an briefed decision about do you need to buy Intel Core i5-1240U or not.
All the number that you have looked at here do not mean that taking them into account you should fully trust a simple quantitative comparison. Be sure to watch benchmarks video and read the opinion of real owners of Intel Core i5-1240U before making a choice buy this CPU or not.