Reply to Traktor S2 mk1 vs Z1 and X1 mk2

Hey all, big beginners question but I want to buy my first set-up as a hobby and maybe play some house parties/make mixes. The original S2 can be had on Amazon for $300. The alternative is going with a modular set-up of the Z1/X1 mk2 which would run me around $350. Is there anything the Z1/X1 set up can't do that the S2 can? Any advantage to the Z1/X1 setup outside of less footprint (size?)