These, if I took them, would replace the fronts that are on 4mm fella? I wouldn't be swapping, just directly replacing with worns, or is that where you meant the swapping comes in i.e. they're from another vehicle?
I use worns purely for cost reasons and I can get some decent brands and tyres at 5-6mm for pennies.
My last tyre purchase were the brand new ContiSport 3's that I've got currently on all four corners
I've used worns in the past and they've always been absolutely fine, be it Pirellis, Michelins or Contis. 90% of the time they're taken off fleet cars so it's almost all motorway miles although obviously they're never perfect.
If the Goodyears are no good (which wouldn't be my preference anyway) I'll pass on them