The Kingston KC3000 1TB wins in 3 out of 6 comparable specs, with 2 ties. Its biggest advantage is Sequential Read (1150% better).
870 EVO 1TB wins in 1 spec (MSRP: 18% better).
Recommendation
Choose KC3000 1TB if you want the best overall performance — especially sequential read.
Choose 870 EVO 1TB if msrp matters more to you.