Do single loose packs have the same pull odds than boxes?

Do Sun and Moon series loose packs have on average the same pull odds as packs pulled from boxes?They would be coming either directly from the distributor or from blister packs so weighing and searching would not be an issue.
I’m just wondering if on average the pull odds are the same as the ones from boxes? I know boxes have a stronger guarantee, but theoretically that shouldn’t matter as long as you only care about the odds.

I would imagine that the pull rates would vary alot, one batch could have very few good pulls, while another batch could have multiple full arts etc.

I just changed ‘pull rates’ to ‘pull odds’ in my post to reflect what I mean, I can definitely imagine that the variance will be way bigger indeed.