As usual...scook is right

The first one had the Hardgroove content, now it's separate although it's still in your account and permanently activated.
The reason for this is Brian intended to release the library as a commercial product, but he switched to SONAR last year from a "Pro"gram that shall remain nameless

and thought the membership thing was cool. So he agreed to let the early adopters who signed up for the first release get the loops for free, but then it would become the commercial product that was intended originally.
The Kick Start expansion pack is also a free exclusive for those members who signed up prior to or during the Everett reelase. It won't be included in subsequent releases but again, for anyone who gets it now, it's in your account and permanently activated so you can reinstall it at any time.