Its a difficult question and more or less depends on your area of interest.The biggest difficulty with scdjws exam is the lack of certification oriented material.For scwcd i read manning book which was certification oriented and helped me a lot but for this exam you dont have such a luxury.
Plus during my preparation for WCD I hardly found any topic which were difficult to comprehend but during this exam I had to face many obstacles and had to come to this site only for the rescue.
But as far as the main exam is concerned I found this exam a bit easier.There were too many straight forward questions and even if you had just an overview of all the topics you could have easily answered those questions.
So I think I have confused you a lot
.But those were my views and might differ from others.