While manufactures don't usually issue sound or db ratings on pumps, as long as they are sized and installed properly, either one of these pumps should not be overly loud when running. If you need to insure that this is the right pump for you, we would need to know all the following information: Water Source (city water, holding tank, pond, lake, etc.).  Incoming GPM (gallons per minute) and PSI (pressure) to the pump. Required or preferred PSI (Please note these pumps will not increase your GPM). Piping diameter leading to the pump and exiting the pump. Piping distance and max vertical lift from the pump to the furthest point in your system.