The Samsung 870 EVO 2TB wins in 3 out of 6 comparable specs, with 1 tie. Its biggest advantage is Capacity (100% better).
FireCuda 540 1TB wins in 2 specs (Sequential Write: 1787% better).
Recommendation
Choose 870 EVO 2TB if you want the best overall performance — especially capacity.
Choose FireCuda 540 1TB if sequential write matters more to you.