The answer to 'which is better pressure regulator or' is that a pressure regulator is generally better than using no regulator at all. A pressure regulator helps maintain consistent water pressure in your home's plumbing system, which can provide several benefits.
Pressure regulators are designed to reduce the main water supply pressure to a lower, more manageable level for your home's fixtures and appliances. This helps prevent damage to pipes, faucets, and other components that can occur with excessively high water pressure. It also helps improve the performance and lifespan of water-using devices like washing machines, dishwashers, and showers.