Bear with me, I tend to ramble.
So a cheap supermarket sausage is still a sausage, and performs well covered in ketchup and mustard, but is not as nice as the higher meat content branded ones. These in turn are nowhere near as good as farmyard sausages.
Ditto guns. Put assorted 9mm pistols on a bench, they all lob lead the same way, but will perform differently. I'd love to see this sort of thing in game! For example:
Refurbished or Salvaged Tactical laser (all stats 5% lower than normal)
Sigma shipyards Tactical laser (normal, 5% longer range)
Tri-Tac E mod Tactical laser (3% less flux, 5% more damage)
Tri-Tac Mil Spec Tactical laser (5% better all stats)
It would add a nice 'random' element to the shops 'n' drops, not much 'real' effect in the game, but a little tweak for depth.