WD currently Ultrastar are pretty good HDD in general I have never own Seagate so I can't comment on that brand but I'm sure they are pretty good drives as well.
I have some very old drives that still running across my home network systems and not a single issue and I'm talking 10-12 years old, not even single write error rate which is the very first thing you see when your drive has any type of issues.
Over few decades of using mechanical drive and not having single one fail on me...heck I have few drives that are almost 20 years old still working, although I don't used them on daily bases but keep them as souvenir.
I follow some few rules I try to stick with and because of such good results I believe that works for me.
Anyhow, I'm sure anything above 8TB is Helium and that will be across all brands, the density of platters wont allow to go beyond that capacity without use of Helium so I'm sure the 16TB is most definitely Helium.
tbh. and depends on how long people planning on keeping their drives and that comes from user of both Helium and standard drives I still think none Helium HDDs last much longer, there is no prediction how long neither of drives will last, they all are ticking time bomb, but I'm seen some performance and noise level difference between both types of drives.
I have 2x 12TB that are 3 years old and I know thins slight louder noise in both of them, I'm sure its the helium leak, Its inevitable process of Helium, that is the reason I prefer 8TB as they are still standard HDDs.
Last edited by NewUser16; 09-23-2019 at 10:09 AM.