"Changle" is generally used to describe long-lasting happiness and happiness. For example, "their husband and wife live a long and happy life, which is really enviable."
"Always happy" is more used to express the meaning of always happy and always happy. For example, "he can keep a happy and optimistic attitude in any difficult situation."
Therefore, "Changle" and "Hengle" are not better, and their use depends on specific contexts and occasions.