This happend now very often:
I search for a certain item where are many manufacturers doing their business in. I am not looking for a certain brand just the generic item because it will not hurt if it is from manufacturer a or b.
In last time i very often see, that Google puts Amazon on #1 with brand A and all following entries are from Brand A, not Brand B,C or D. Some other brands now Show up page 3+ and naturally on GSA.
So is using Google what is most searched on Amazon?
Spelling for this items are the same.