Side-by-side spec and price comparison. Live data from Amazon US.
Seagate SkyHawk 3TB ST3000VX009 balances price ($34.00/TB), warranty (3 years), and 180TB/yr workload rating for the best overall value.
MDD 3TB offers better value at $33.33/TB vs $34.00/TB - a 2% price difference. Factor in warranty length and workload rating when the price gap is small.
Mixing drives of different models in RAID is not recommended even if capacities match. Different firmware, error handling and seek patterns can cause rebuild issues. Use identical drives within the same RAID group for reliable operation.
Seagate SkyHawk carries a longer 3-year warranty vs unknown years for MDD 3TB. Both are enterprise-grade drives built for 24/7 operation.
MDD 3TB is the better fit for NAS storage. It uses CMR recording which is safe for all RAID levels. SATA interface is compatible with all NAS platforms including Synology, QNAP and TrueNAS.