A copper brush and Hoppes #9 will work for both. It is my impression that you are over thinking this though. Neither are bad for your barrel. Lead can be picky about bore size where jacketed/plated don't tend to care. If lead works for you, you shoot outdoors and you don't mind washing your hands more go with lead and save some money.
What calibers are you shooting where velocity would be an issue with either plated or cast? I shoot hardcast lead in full power 357 Magnum loads all the time with good results.
New gun, same ol' shot.