Having used Twitch for years this may be a bit biased but I absolutely LOVE it and does exactly what you are after. I can slip in my backup along with my laptop so size is perfect. In terms of control, simple 2 deck control (as long as you don’t mind touch strips, but i personally find them very easy to use). 8-cues / drum pads for each deck for samples, effects etc plus it has mic & aux inputs should you want them
You won’t get the same feel as the S2, i personally think the knobs and faders feel more firm + you have the traktor integration, but I stand by twitch 100%, perfect for portable DJing! I’d imagine as its been out for a while now you can probably get it for cheaper, got mine for £300 and that was 2 years ago
Hope this helps