Let´s take for example the environment of a NAS … drives need to be more resistant to vibrations, temperature and the 24/7 usage. So NAS drives are enhanced to work these adversities out without any problems.
Then the SkyHawk drives that are made for surveillance systems, are similar to the IronWolfs but do not have to deal with vibrations, so that feature is not necessary for them.
And the BarraCuda on the other hand, that are made for normal desktop usage, need to be fast for the operational system, therefore their feature is the speediness.