WD Purple PURZ vs PURX and 512e?

HI I got some questions about thr putple drives. Any of these answered would be great!

*Is the WD Purple 4TB WD40PURZ or -PURX 512emulating and 4k physical. Or both physical and logical 4k?
*What’s the difference between WD40PURZ and PURX ?
*Are these purple drives SMR or CMR?
*Why do these come in two designs (see picture) ?

Western-Digital-WD40PURZ-2965382245
20210708_115817

Hi @Ezio,

Please refer below link to check PURZ specification:

Please refer below link to check PURX specification:

Those datasheets don’t say everything. Like is it CMR or PMR, and is it 4kn or 512e.

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