Audio Interface vs. DJ Mixer with USB

What up DJTT. Had a super quick question. Looking to get a new sound card for the setup, and found out it's a financially viable option to get a DJ mixer with a built in card for about the same price of an audio interface. Was looking at an entry mixer like the Numark M101 or the Spyn Sx2 in comparison to one of the focusrite interfaces (scarlett). I wanted to be able to route out of ableton into it, and use the mic input to route into ableton and run FX on, but then also have the mixer for other live gigs with Traktor. Just an idea. Lemme know!