All the hdd manufacturers I used to buy from have been eaten by the 3 remaining giants.
But it doesn't matter because they still produce the same things, in the same locations, like they have for the past decades. It happens when all companies consolidate down into fewer and fewer manufacturers.
The actual brand name means very little. As all the parts inside the drives are identical, produced by the same machines in the same locations, just labeled with a different company name.
So to answer the original question: if one is ass, then they're all ass. As they're all virtually the same company at this point.