I have finally completed 70-270 and 70-215

i am thinking of doing 218 now. I wanted know whether my current knowledge of those 2 exams that i have done is enough to take on 218 or i need to do more study on it or is there more to study in 218 than 215? i saw the books on it and it is very similar to the 215 stuff. can anybody tell me on how to prepare for 218??