The Samsung 9100 Pro 4TB wins in 3 out of 7 comparable specs, with 2 ties. Its biggest advantage is Capacity (300% better).
WD Black SN8100 1TB wins in 2 specs (MSRP: 62% better).
Recommendation
Choose 9100 Pro 4TB if you want the best overall performance — especially capacity.
Choose WD Black SN8100 1TB if msrp matters more to you.
