Originally Posted by MidnightBlueZ

To be honest I am not sure but here is what I found on KW's website directly for their descriptions of both setups... Seems like dampening adjustment is the difference...

"KW Variant 1: Sporty - Balanced. With KW factory pre-set dampening.
The ideal system for customers who like to choose the customer lowering of their vehicles while counting on the extensive driving tests of our experienced engineers who have preset the dampers for the ultimate balance between sporty driving, comfort and safety."

"KW Variant 3: Race technology for the road, with adjustable compression and rebound dampening.
State of the art motorsport technology enables better performance on the streets. The independently adjustable compression and rebound dampening allows for cutom driving setups.
The exclusive KW patented system has dual level valves that allow for adjustment of the rebound dampening for your road comfort and the compression dampening that controls the driving dynamics."