Wheel bearings quality issue

[Mike Posner <posne@cts.com>]

In a recent order from my local parts  supplier , I ordered some new wheel
bearings for my 200.  I asked what brand  he  carried, and he said SKF or
FAG.  The bearings I received were  neither of these. 
It's an SNR , A bearing which Im not familiar with. I go by appearance
on  bearings and these look dull with fine  grinding marks on the sides of
the casing,.   made in France. and the company shows on an internet search
as a subsidiary of Renault. Should I be concerned? IM getting  upset with
the delivered goods not being  the stated brand.  I recall the
Top line bearings like SKS and Fag having a highly polished stainless
sheen,  these  are dull matt finish, looks like base metal on a cheap
watch.   Please let me know if   Im  overly
vigilant  re  appearances. 
.
Thanks, Mike.