And unless you looked it up, you'd never noticed the difference (save comparing the two side-by-side). Whereas the cheap laptop requires one to know the difference so you can get the right driver, or other jackery because your WiFi card was a mid-year change. It reminds of me of mid-year production changes on cars, where VINs XXX-YYY need part number ZZZ, but VINs AAA-BBB need part number CCC.

What colour is the stripe on the spring? I can't look this up, not even by VIN.

Wore off eight years ago. Can we guess?