If the cable is Duelund, then the quality remains the same, but the sound signature changes.
https://forum.audiogon.com/discussions/duelund-speaker-cable
I prefer the 16 over the 12. Others don't.
I do wonder, however, whether some cable manufacturers deliberately (and unnecessarily) make their cables super thick to nudge the user's perception of them to one of power and muscularity in the sound.