Both passages describe Jotham as doing what was right in the eyes of the Lord, following the example of his father Uzziah, but not entering the temple of the Lord.
2 Chronicles 27:6 notes that Jotham became mighty because he ordered his ways before the Lord, which aligns with Proverbs 16:7, stating that when a man's ways please the Lord, He makes even his enemies to be at peace with him.
2 Chronicles 27:5 describes Jotham's victory over the Ammonites, similar to his father Uzziah's victories over the Philistines in 2 Chronicles 26:8, showing a continuation of military success and divine blessing.