I'm not sure what exactly you mean - they're different lines of drives. And different SKUs on Amazon. The probability of me getting sibling drives out of that - and that's assuming the only difference between red pros and golds are binning - is infinitesimally small.
in my case i use 2.5" 5TB disks. there is only one model from one manufacturer making those.
i bought one each from two different shops located in different parts of the country 5 years ago. i used them in a mirror raid. one of them died a year ago. then i got two more drives, one of which was second hand slightly used. the price was good and i figured it was a good way to ensure i'd get drives from two very different batches.