Not real sure how I would know which is best or not - was my impression that Lake City 30-06 and IVI 7.62 NATO and 5.56 NATO were decent, so I had been accumulating them. My choice most likely because I read they were good, not because I proved it one way or the other - typically used to be cheap to buy.
I bought several "red/black label" bags of Winchester 22-250 - in only bag of 100 I have opened, about 25 of them needed much fussing to even be useable - and is two more unopened bags - some case neck mouths were shaped like "pour spout" as if taken off some sort of forming die without completely removing - would not even chamber into rifle as removed from the bag - several show signs what I think are, or might become, splits on case mouths. Several had folds on the shoulders as if annealing was not sufficient while being formed? Never saw that previously on W-W "blue label" bags - I have gone through multiple bags of R-P and W-W over the years - is so many for any one cartridge that I doubt that I have reloaded any of them more than about 4 times - can not say how I would know one to be a lot different from another, so far.
Then reading on Internet that many sellers / brands actually have jobbers or contractors to make the brass, now-a-days - recently bought three bags of 7.62x39 - sold as "RUAG USA" brand - head stamps say "MFS" - so sold by USA company (owned by parent company in Switzerland?), but made in Hungary. Is alleged that the various Weatherby headstamped brass here is made by Norma - at least at one time.
Before prices went all stupid about most reloading things, I bought 4 boxes of 20 Weatherby brand 7mm Weatherby Magnum brass for $2.94 each case (Oct 2020) - mailed to me - I loaded up 20 - 19 of them worked, one would not chamber into a 7mm Weatherby Mag, and the rifle was also a Weatherby branded Mark V. I have not yet opened the other 3 boxes to try for fit into the rifle. So like Winchester brand ammo and Winchester brand firearms - not made by same company, at all, any more.
So far as I have experienced, brass "dies" by necks splitting or primer pockets getting loose. I only know to back off from "hot" loads to make pockets last longer. I never used to for many years, but recently started to anneal case necks - I believe that helps avoid splits. But I can not say that any particular brand of brass responds better or worse than another brand - totally am confounded today as to who even makes the stuff - brand appears about irrelevant - is as if two or three brands could actually be made in same factory, by same jobber. Then from year to year, brand stays the same, but is likely a different jobber used. Even within a factory is different lines - so no real reason to believe what comes off Line #1 is same as what comes of Line #8 - but both are likely within whatever tolerances are required, if there are any.
But I did satisfy myself that there is volume variation - even among brass from same box or bag - as well as one brand to another - by weighing cases and weighing a second time when full of water - even from same box/bag have not been identical - my relatively crude scales can easily measure difference among them.