What stands out about Model R10-5A10-120 is the even gap between contacts.
R10-E1Y4-J10.0K Potter & Brumfield Sensitive Plug-in Relay 4.5mA 4PDT 2A 28VDC
What stands out about the black finish is that it tends to look less flashy while still feeling solid.
You will find that Model R10-5A10-120 pairs well with common DIN rail setups.