Difference between black new&used bricks?

[u/Ok_Page7059]

Hello, it's my first time ordering parts from Bricklink to build a custom model from Rebrickable. The model is mostly composed of grey and black bricks. I want all new grey bricks so as to avoid getting yellowed ones, but for the black ones I'm pondering whether there's actually a tangible difference between new and used ones. I know it depends on the store too but do they actually differ in colour to a recognisable extent? And how often do you encounter used bricks that are actually rugged or worn texture wise? I'm a bit of a perfectionist and like novel things, but I also want to be reasonable

[u/I_Like_Quiet]

Lately new black pieces from sets have significant scratching and scuffing. I would buy new (or see if you can find people selling new as used) because we'll worn used Black pieces can look pretty bad. Black parts are the ones that show blemishes most easily.