What is the deference between RB921GS-5HPacD & RB921GS-5HPacD r2 ❔

What is the deference between RB921GS-5HPacD & RB921GS-5HPacD r2 :white_question_mark:

Where do you see it ?

r2 = some times lite version, level3
r2 means also sometimes hardware revision 2, like the new omnitik

Thank you for reply
I see in mantbox19s