I just got my 180 yesterday from the MAC warehouse in Ontario Canada, and I still have the packaging.
My first question is: is this the pictures the ebay seller provided, or are these pics of what you actually received? Because often fakers will steal legit pics to use in their listings. So it would be more helpful if you posted pics of what you actually got.
The packaging is missing two lines at the end. The first is MADE IN JAPAN / M8880-01 the second line missing is MACCOSMETICS.COM
The second thing I notice is the MAC label on the brush itself is not straight, its leaning in the pics you provided.
The bottom of the brush is identical, including the spacing in the 180 typeset.
Hope that helps, but please provide pics of the actual brush you received to know for sure.
HTH