I've been using and will continue to use OEM parts----having seen that Power Stop brand I notice they tend to be sold by the discount parts houses, most like "popular" because they're cheap and not necessarily good.
Sadly I've seen a few on FTE who swear by that brand but having seen the nature and relative lack of any real mechanical knowledge or experience of those making such claims I'm highly prone to greatly discount those accounts.
I'm running a full set of OEM front calipers and rotors for well over 100K miles and they've held up well without a single operational issue. I've rarely seen any of those cheaper brands come close to that longevity.
Cheap is cheap because they're cheap---there's no other reason. No one is out to help us with superior quality parts at a greatly reduced cost readily available. Anyone selling them does so because the make a profit if they sell us something---if parts wear out sooner that's okay with "them"---they believe we'll be back to buy more of the same.