it's different , Luffy uses his devil fruit in creative ways to boost his already high physical power and raw moves, same for Zoro using his Swords to the level he is now took 12+ years of training , Sanji on the other hand trained to use his kicks but the Fire Buff doesn't require any training he just ignites on fire same for the RS he just wears it and bum he's more durable, invisible,faster etc