WD RED Plus 6TB models

[Enquiries]

I am after some quiet HDDs for an media server/backup QNAP NAS in my lounge. I bought some 8TB Ironwolfs and they are too noisy. Scan.co.uk are listing two WD Red Plus 6TB models, with the 5400rpm one labelled as NEW. Any thoughts on the differences with these two?

Thanks!


6TB WD Red Plus WD60EFPX NAS Hard Drive, 3.5" HDD, SATA III 6Gb/s, 5400rpm, 256MB Cache, NCQ, OEM

6TB WD Red Plus WD60EFZX NAS Hard Drive, 3.5" HDD, SATA III 6Gb/s, 5640rpm, 128MB Cache, OEM