Metal Gear Solid vs. Splinter Cell

So we had a nice long argument in /v/ discussing both of these games, it went on longer than expected with both sides showing lots of support. Let's try to continue the discussion here: What series is better? but most importantly, why is it better?

>>20
>He can dig bullets out of his fucking skull with a knife.

...And characters from DBZ can blow up planets with glowing stuff from their hands (over 9000!!!!1one), but does that make it good? Splinter Cell is much more fun and more realistic as well.