when it comes to low voltage mic and instrument cables, i notice a significant difference in silver. i do not care for them, and dumped my zaollas at a loss. i prefer the off the shelf mogami gold, which i assume is "just a regular cable" and what shipshape was referring to. beyond this, i use all sorts of mogami and the really thick high end monsters - and i notice no real difference between them.
when it comes to short line level patch cables i don't sweat it, but i'm not mixing off a console.