A nice touch is the labeling on, which makes identifying coil polarity simple when you are deep into a wiring session.
EAW ZR 25 Relay 1 TO 20 SEC 220V 50/60HZ IP40
The ARD4UR model feels solid in hand, and you will find that it snaps into place without fuss in most enclosures.
I like how the Omron branding looks understated yet professional on the relay body.
A nice touch is the TE Connectivity brand on the relay, which makes the setup feel complete.
A nice touch is how the relay resists minor vibration, so bench tests stay predictable even when cables get moved around.