Hello Hans. Salting and marinating serve different purposes when preparing meat, especially economical cuts like pork shoulder or loin.
Salting (Dry Brining): Applying salt hours in advance draws out moisture, dissolves the salt, and is reabsorbed into the meat, breaking down proteins and retaining juices during baking.
Marinating: Typically uses acids or enzymes to flavor the surface and slightly break down outer tissues, but it does not penetrate deeply.
For a cheap cut of pork, salting is far better to prevent dryness without buying expensive additions.