Master cyclinder Q

[feelstranger]

Hey all, I just picked up a master cylinder off Ebay for the avant and it is
a Sachs part number is apparently 443 721 401 A (written on box in pen)  -
the picture that was on the auction was of an ATE box with part number
listed as 4A0721401 which is what my ETKA shows is correct.
beyond the ethics of the auction -
do I care if this is a Sachs and not the ATE?
is that part number correct?
Thanks
Nat