Difference in KRP and KRPA series relays

There is a physical difference in the body appearance of the KRP and KRPA series relay by TE Connectivity Potter & Brumfield. Per the manufacturer datasheet, “The KRPA is the automated manufactured version of the KRP.”
Link to the parts Digi-Key offers to the KRP and KRPA series.

KRP (Older version, enclosed)
KRPA (Newer version, enclosed)