The EN 1143-1 standard applies to safes, strongboxes, safe doors and strongrooms. It defines resistance to burglary and classifies safes into classes 0 to XIII, to which an indicative insurable value is usually linked.
The EN 1627 standard applies to burglar-resistant doors, windows and façade systems in buildings. These are classified in resistance classes RC1 to RC6 and are designed to delay burglary attempts through the building envelope.
In short: EN 1627 protects access to a building, while EN 1143-1 protects valuables stored inside a safe.