HDD WD blue 1T WD10EZEX model differences

[EmmaDobozi]

Please help me to figure out HDD WD blue 1T WD10EZEX model differences. The 2 versions are :
- WD10EZEX model 00BN5A0
- WD10EZEX model 00WN4A0
I would be grateful for your kind advice.
Emma

 

[D_Know_WD]

Hi there EmmaDobozi,

There's no difference at all.

The numbers after the dash are for in-house use. The ones that have some meaning are the first ones.
Check this out: http://products.wdc.com/support/kb.ashx?id=quvctn

Let me know in case you have some more questions,
D_Know_WD

 

[EmmaDobozi]

I have to decide to use one or another version as main HDD ; this is why I asked.
Searching for info, I got to an article that I do not understand.
https://www.techpowerup.com/forums/threads/warning-older-wd-blue-hdds-have-idle3-at-12-8-sec-wd10ezex.215633/
The thing I was able to figure out is : among different generations of the same family might be significant differences.
I suppose that model number denotes firmware improvements, optimizations.
Also, I went trough a long series of shared experiences at http://www.overclock.net/t/1297633/wd10ezex-review-wd-blue-1tb-single-platter-drive/350 hoping that I will find the answer.
This is why I asked for expert advice ; I hope that someone will help.
I am thankful for your help,
Emma