Side-by-side: Samsung 9100 PRO 1TB ($280) vs WD_BLACK SN850X 1TB ($119). $/TB winner, specs, real-world picks for May 2026.
This is a generational matchup at 1 TB: the older-gen drive offers proven reliability and better $/TB, while the newer-gen sibling brings raw bandwidth that most users never tap.
Hardware-wise, the Samsung 9100 PRO 1TB runs on the proprietary Samsung Presto silicon found only in the 9100 PRO line. The WD_BLACK SN850X 1TB pairs WD's G2 controller — manufactured by SanDisk and tuned for low-latency gaming workloads.
Money matters here — $119.00/TB on the WD_BLACK SN850X 1TB versus $280.00/TB on the Samsung 9100 PRO 1TB. That's enough of a spread that for budget-conscious builders, the WD_BLACK SN850X 1TB becomes the default unless reviews of your specific workload prefer the Samsung 9100 PRO 1TB.
In the read department, the Samsung 9100 PRO 1TB leads by roughly 7 GB/s. The difference is more academic than practical for typical use, but it does matter for video editors moving multi-GB project files.
Write performance separates them too. The Samsung 9100 PRO 1TB sustains 13,400 MB/s writes versus 6,300 MB/s for the WD_BLACK SN850X 1TB — a real advantage for video editors and anyone doing heavy file operations.
For PlayStation 5 builds, the console's internal M.2 slot tops out around 5,500 MB/s sustained, so both Samsung 9100 PRO 1TB and WD_BLACK SN850X 1TB hit the same wall — pick whichever is cheaper at the moment you buy. Comparing across generations always invites the same question: does the bandwidth gap convert into user-visible improvements? Honest answer for the Samsung 9100 PRO 1TB vs WD_BLACK SN850X 1TB pairing: only for sustained sequential reads of multi-GB files. For content creators routinely rendering 4K or 8K video, the Samsung 9100 PRO 1TB's 13,400 MB/s sustained write is the deciding factor — multi-GB project files land noticeably faster than on the alternative. Note for handheld gamers: M.2 2280 is the desktop/laptop standard. Steam Deck and the ROG Ally line need 2230 drives — neither Samsung 9100 PRO 1TB nor WD_BLACK SN850X 1TB fits without modification.
Go with the Samsung 9100 PRO 1TB for meaningfully faster reads (14,700 MB/s), and higher sustained writes (13,400 MB/s). Among consumer SSD makers, Samsung's PRO series consistently scores highest on long-term reliability surveys (Backblaze, Puget Systems Q1 2026 data).
Go with the WD_BLACK SN850X 1TB for the lower retail price ($119 vs $280), and better $/TB economics ($119.00/TB). Among Gen 4 flagships, the SN850X strikes a sweet spot — premium silicon at sub-Samsung pricing, with WD's established RMA process to back it up.