When it comes to Omnisphere 3 and it's hardware integration, not all controllers are born equal. Some have as few as 4 configurable knobs whereas others have 16+. Considering that the hardware assignment is just a bunch of midi CC# mappings, and that many of these controllers can have their buttons remapped (often via software).
This table is meant to help people get the most out of the hardware integration, more than what Spectrasonics claims to offer. Just manually remap the midi CC buttons/knobs/faders on your keyboard so it matches one on this list that has more functionalities/mapped parameters than yours ;)