Question What is the difference between these two please?

[finwizz]

Have found these two modules. What is the difference please? Has different supplier code - one is 4M2B and the other 4M2Z.

https://www.corsair.com/ww/en/Categories/Products/Memory/vengeance-lpx-black/p/CMK32GX4M2B3200C16

https://www.corsair.com/ww/en/Categories/Products/Memory/vengeance-lpx-black/p/CMK32GX4M2Z3200C16

 

[Calvin7]

Only one is approved to be compatible with AMD 300 Series,AMD 400 Series,AMD X570 Chipset Motherboards.

 

[finwizz]

Only one is approved to be compatible with AMD 300 Series,AMD 400 Series,AMD X570 Chipset Motherboards.

Which one please? I am planning to get Strix X570-E board.