Had not seen this till now, Johnny, I think you gotta work a bit on your thread Titles, better titles will attract more people
Regarding your question, its very simple:
Official Poker Rankings used to ONLY give you info on a player's MTTs and some SnGs (multi table ones like the 180 person) Now they do down until the 45 person SnGs which is great.
Sharkscope on the other hand is ONLY for SnGs, be it HU, Single Table or Multitable SnGs, plus you get detailed graphs and info regarding all your Sit and Go play.
Hope this helps,
USC