Are Golden Flow milk; Mehadrin milk; Shop Rite milk EXACTLY the same? NO.
Are they all considered Cholav Yisroel milk by Rav Moshe? YES.
Rav Dovid and Rav Reuven Feinstein, Rav Moshe’s two sons, paskin that one may purchase Chalav Stamm milk L’chatchila; so who’s got bigger shoulders?