The Kingston KC3000 2TB wins in 3 out of 6 comparable specs, with 2 ties. Its biggest advantage is Sequential Write (1221% better).
870 EVO 2TB wins in 1 spec (MSRP: 7% better).
Recommendation
Choose KC3000 2TB if you want the best overall performance — especially sequential write.
Choose 870 EVO 2TB if msrp matters more to you.