I have a question. I want to buy a new laptop to edit my videos when I'm traveling. So I was searching for a laptop with a i7 CPU, SSD etc. But what makes the quality difference between an old model laptop in comparison to (as example) a new Zenbook with the same hardware specifications?
Not sure what you mean about quality difference, it's the same as getting any used system, you have less or no warranty and the parts may fail sooner. A used system is more likely to fail of course. Not that it will for sure, but there is a reason there is a 1-2-3 year warranty on items and usually not longer.