Well i will say that splinter cell is better than metal gear BUT only for PC users because metal gear was not made for the pc and if you want to play the 3rd and 4th part you will have to buy a console. If you have both PC and console then i prefer metal gear. Because it has got a great story and good gameplay and a perfect AI. But if you think metal gear as a stealth game, it sucks because people rather try to kill more guards instead of hiding and if you do that in splinter cell, you will most probably get killed or your mission will either become difficult or it will fail. So for pc users Splinter cell is great but for console, metal gear rules every other game.