Dealer is probably talking about EDC. Electronic Damper Control. It's variable adjustments in the shocks. The KW system replaces the entire shock and spring setup.
Up to you what you value. Some people prefer the KW system, not sure why, but some people do. You may be able to get someone to do a swap with you.
Read this:.
http://f10.m5post.com/forums/showthread.php?t=759602