What is the difference between the remembrance of Ruku and prostration?

Question 36: What is the difference between the remembrance of Ruku “Subhana rabbya al-atheem wa bihamdih” [Glory and praise be to my Lord the Almighty] and the statement of prostration “Subhana rabbya al-ala wa bihamdih” [Glory and praise be to my Lord the Most High]”?