Quality is a different thing, and that's not what I was referring to.I must use more screws than you do. Some of the cheap crap main/joinery contractors give us to work with are absolute sh1te for so many tasks. So no, not all screws are equal - which if you used better stuff once in a while, you'd realise. But then, you knew I'd contradict you on this point, didn't you?
A basic wood screw does exactly the same thing as any of the likes of Spax, Reisser or whoever with their "features" when used for general fixing. We're not talking about specialist screws for specialist tasks here.
The cost of some of those screws is partly taken up by elaborate processes, exuberant marketing, and pure profit. But it's a waste of money.
I would suggest that people must have a screw loose to buy into the claims.