Side-by-side spec and price comparison. Live data from Amazon US.
MDD 6TB SATA 6G 7200RPM Enterprise wins on both price ($26.67/TB) and warranty (5 years).
MDD 6TB offers better value at $26.67/TB vs $59.78/TB - a 55% 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.
MDD 6TB carries a longer 5-year warranty vs 3 years for WD Red. Longer warranty typically correlates with manufacturer confidence in reliability.
MDD 6TB 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.