“What’s the difference if the OU attests that certain milk is kosher or if Chaim Yankel (who we believe to say he saw the cow milked), claims it’s kosher? Once milk has hashgacha that verifies the milk’s kosher status, in my opinion, that milk is chalav yisroel. “
From everything I heard in life and in this thread even Rav Moshe (or any other Rav from everything I have heard) never said
“they are exactly the same” .
And if anyone claims that pointing this out is “putting anyone down” they are just trying to embarrass people into not having a fully open and honest discussion.
I do not know enough to fully know what the exact difference is.
I just try to follow the Rabbonnim.
Those who want to claim the Rabbonnom are wrong, let them go argue with the Rabbonnim.