New SDX pack for Superior Drummer. Here's the poop.
http://www.toontrack.com/product/indiependent-sdx/

Indie Folk EZX on steroids.  I like Indie Folk EZX might be nice addition to my SD2 library.
 
I don't have any SDX libraries as they seem to be so much more expensive than the EZX libraries.
 

I like the sounds, but if the Indie Folk EZX is any indication, the velocity response is very different from the other Toontrack products. Much tweaking is needed to make Indie Folk playable using my V-Drums.

I would think the SDX is a whole new program not sharing anything with EZX. Isn't EZD 16 bit and SD 24? Anyone? Bueller?

the indie folk ezx is 16 bit.
 
the independent sdx is the same sample session that inde folk was used.  there are more samples and more kits.  less processing.
 
The Indiependent SDX comes from the same sessions as the widely popular Indie Folk EZX but features the raw, unprocessed recordings. In addition, it comes with two extra complete kits, several additional instruments and a total of sixteen mixer channels. All in all, you get five complete kits of impeccable, all-vintage and rare drums showcasing an incredible range and detail.

Traditionally the SDX packs are of raw samples with various mic placements and allow for full treatments as if you had recorded the drums yourself. Its the more real (if it can be called that) of the 2 EZX or SDX.
 
It gives you more choices. I don't have any of the EZX packs as my preference has always been foralways gone for the SDX.