Per the chart, the Limited Edition version gets zero extra in-game content. You're shelling out $69.99 on top of the game's retail price for mass produced physical crap that's literally going to sit on a shelf and collect dust after you've looked at it once. $69.99 for a statue, flimsy mask, metal disk case, soundtrack CD, and a half-assed art book? I'm not even going to count the "collector's box" since there's nothing special about a freakin' cardboard box (unless you're Solid Snake or a cat).
Since nothing in this version enhances the game you're buying, do you really need all of this extra dust-catching shit? Since they're going to manufacture a metric fuckton of these, they won't really be "limited". When you get tired of all this plastic crap sitting around taking space you won't get much for it because there will still be lots of them out there for anyone who wants them. Right now on Amazon, I can buy sealed, new, copies of GOW3 Epic Edition (X360) and Skyrim Collector's Edition (PS3) for under their original MSRP.
That's $69.99 you could used to buy a complete other game. Conversely, you could take a third of that and buy the Season Pass and ensure you actually get more content for the game.