Both are pretty hard graft. Corporate Law in the MC is perhaps slightly easier, but equally if you are working for a white shoe outfit like, for example, Skadden Arps or Latham and Watkins, chances are you will be working just as hard as anyone at Citigroup/Morgan Stanley etc, and the banks pay far more (not necessarily in terms of salary, but the bonuses are hugemongous). You will have little social life at either, and both involve lots of photocopying for a while (albeit very well paid). I should'nt worry about either until you are at uni- do internships in both and make your mind up afterwards.