What notable wording differs between al-Zumar 39:73 and 39:71?

Rhetorical Addition: Emphasis, Explanatory Coordination, Connections and Multiple Meanings

• The first has “wa-futiḥat”; the other has “futiḥat”
• Both contain a wāw but differ only in case ending
• Both have exactly the same words and order
• The first wāw is conditional and merely omitted in the second