Two monitors can share a panel and differ by years of service life. The difference is usually how the layers are bonded and where the heat goes, not the spec sheet.
Brand & Manufacturing
Inside the factory: lamination, heat dissipation, patents and supply chain.
Inside the Factory: How 100,000 Monitors a Month Get Laminated, Polished and Tested
A monitor is the sum of its assembly steps. Here is what lamination, edge polishing, aging, calibration and final test each have to catch, and what a factory tour still does not prove.