Theoretical or practically better?
Theoretical says rub down with 400 or 600 grade wet and dry, and leave it matt.
Practical says: you can’t do that before every sail. You need to do it before every sali as dirt sticks so easily to a matt finish. Any speck of dirt is worse than having a nice shiny hull.
So: wax / polish (the teflon based yachty stuff works great) and get the boat looking good – it will make you feel much happier showing the boat off, and therefore help you to sail faster.