Hi Raj,
I have completed
SCJP and SCJD and now preparing for SCEJA. But, sorry buddy, there is no exam which requires less labour. Your objective should not be to just to clear certification, but, to clear your concepts along with the certification. If you are really interested in clearing a exam you will never think of the labour required. Rather you will think of how useful it will be, if you clear that exam.
So, if you think you are more oriented towards coding go for SCJD, and, if you think you are more oriented towards designing go for SCEJA. Both are equally good. Its for you to decide which one to go for.
As far as I am concerned, I choose to do both SCJD and SCEJA. Because my funda is different. I think that by preparing for these certifications you actually clear your fundamentals. So, if your fundamentals are clear you are confident, which is reflected in your code or design or whatever. And if your base is strong you can grow high.
I think this helps and you are able to decide which way to go.
Regards,
Rahul.