I would have thought you take the hit. Not always cheaper is best. You have to ask who these small companies are/were that popped up, who thought they could undercut the bigger ones, maybe for a while but too small to ride out fluctuations.
Pumps don't generate the pressure, it's the clearances between parts and restrictions, hence it drops when they wear. You could have excellent pressure yet still be starved in parts. Not quite as simple as having a decent healthy reading.