Just got my "standard" edition last night, and it was in a jewel case. It has the same 11 songs as the limited edition digipack. So, unless the booklet contains extended liner notes, I'm guessing the only difference is the packaging. And I prefer jewel cases anyway, so I'm happy.
I've bought the "Limited Edition" and there's nothing special different from the standard version except the Limited edition has a paper cover. The CD insert contains lyrics, and thank yous from the band members not sure of the standard version. No hidden tracks or anything like that. I don't know what the price difference is for at all. Kind of upsetting.
Sounds like the booklet is exactly the same. I'm glad I went with the standad edition. I hate digipaks and only get them if they have bonus tracks. When I pre-ordered my copy, the standard edition was priced about 40 cents more than the digipak edition. Looks like they've both dropped a little since then.