Actually you get 2 libraries when you purchase STORMDRUM. The INTAKT loops and the KOMPAKT multi-samples. There are 2 seperate interfaces, so that each category includes all of the features needed -
KOMPAKT has disk streaming and multi-timbral capability, as well as a host of other multi-sample parameters like auto sample alternation. This is the perfect interface for the multi-sampled kits and percussion.
INTAKT is the ultimate loop* manipulation tool, and syncs the loops to the tempo of your sequencer. It has real - time time compression, cool lo-fi effects, and lots of other amazing features like legato looping.