Originally Posted by Anum Zara

Yes it totally depends on aspirant but as per his background ES is best choice for him. By the way ES is also a new subject and we only have score trends of CE-16 available for comparing both. I think you will also agree that as per CE-16 result ES turned out to be more scoring. Result of GS was average. I have switched my subject due to very same reason. Also for ES 1 book and internet is enough while for ES one book is not enough. I am telling by my experience with both subjects.