Are these the same drive?

Very likely the same Exos X family in 28TB. Product A is ST28000NM000C and Product B's description lists ST28000NT000, which are sibling model codes. Treat the spec sheet, not the listing title, as the difference.

Product B on paper: 270 MB/s sustained versus 190 MB/s listed for A. Both are 7200 rpm helium CMR drives, so real-world sequential speeds land in the same range.

Product B publishes a 2.5 million hour MTBF and a 550TB-per-year workload rating. Product A does not state either, so B gives you the numbers to judge. Actual lifespan depends on power-on hours and vibration in your chassis.

Is one worth extra money?

Only if the price gap is small. The drives are near-identical, so pay extra only for a documented warranty or a verified new condition, not for the badge.

Can I use these in a NAS?

Yes. Both are 3.5-inch SATA 6Gb/s CMR drives suited to multi-bay NAS and servers. Check your NAS vendor's drive compatibility list for the exact model before buying a full set.

Do they support hardware encryption?

Product B states no encryption support. Product A does not list it. If you need SED, confirm the exact model's datasheet before buying.

Seagate Exos X28 28TB SATA Enterprise Hard Drive (ST28000NM000C) vs Seagate Internal Hard Drive 28TB 7200 RPM 512MB Cache

Both are 28TB 7200 rpm Seagate enterprise-class helium drives, and the model numbers point to the same Exos X platform. Product B lists fuller specs (512MB cache, 550TB/year workload, 2.5M-hour MTBF, 270 MB/s sustained), while Product A lists 190 MB/s and a 28TB CMR SATA drive. Buy whichever has the lower delivered price from a seller with a real warranty, since the drives are near-identical. No prices were given for either, so compare live store prices before ordering.

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