traktor kontrol s4 audio interface?

traktor kontrol s4 audio interface?

I want to buy a audo interface but i wonder if the build in soundcard in traktor kontrol s4 will work just as good? i think it would be fun to learn to dj too side by side with music producing in ableton..
i have read that traktor + ableton is a fun and creative setup together.
With a audio interface you use less cpu power? right? does it apply to traktor kontrol s4 too?

An audio interface will increase the load on your CPU vs. your build in sound card. The S4 has an interface built in, so you don’t need to buy a separate one for DJing.

i think i wrote a little unclear..My question was really if i can use the built in soundcard on the s4 with ableton live 9?