There shouldn't be any difference with the card you have. Some cards have drivers optimised for ASIO (E-mu) and then Esi E-WDM drivers are the opposite - higher latency with ASIO.
As you have a card with a plain WDM driver, there shouldn't be much difference between KS and ASIO. However, ASIO doesn't allow you to run more than one card with different drivers and you can't change latency with M-audios ASIO buffer unless you quit Sonar first and restart after the change. WDM-KS lets you use Sonars latency slider anytime you like.
