With the ARD4UR model, you will find that the mounting tabs line up cleanly, and a nice touch is the even screw spacing.
MY2NJ MY3NJ MY4NJ DC12-24V LY2NJ LY3NJ AC220V New MY2N-GS MY4N-GS Omron Relay
Many users say that Phoenix Contact relays operate quietly, which can change in noisy control cabinets.