I don’t think it makes an audible difference... but...
at 30’ or more the chances of inductively picking up a surge voltage from a nearby lightning strike is non zero. Given the chance to run either fiber or Ethernet I would 100% run fiber for that reason alone.
If you are like me you have expensive gear at both ends of a run like that. PC’s on one and HT equipment on the other. Fiber is best, but as I wrote elsewhere, your risk from nearby lightning strikes may be a lot lower than mine.
Otherwise, if you already have or must run a long Ethernet, use an isolator which is certified to UL60601.