The Samsung 9100 Pro 1TB wins in 4 out of 7 comparable specs, with 1 tie. Its biggest advantage is Sequential Write (102% better).
WD Black SN850X 4TB wins in 2 specs (Capacity: 300% better).
Recommendation
Choose 9100 Pro 1TB if you want the best overall performance — especially sequential write.
Choose WD Black SN850X 4TB if capacity matters more to you.
