- "Those 631s are not the brightest lights on the ship."
- ―B1 battle droid on the inferior capabilities of the 631 model
The 631s were known to be more clumsy and even less intelligent than other B1 models, much to the dismay of their OOM command battle droid counterparts.
Some battle droids from this line were stationed on Skytop Station. A supervisor asked a particular 631 unit to carry an important item to another level without dropping it. No sooner had the droid turned around than he immediately tripped and dropped the item.