What is the difference between concentration and attentiveness in prayer?

Answer

In the name of Allah, concentration means contemplating what one does and says during the prayer, including the obligatory and recommended acts. Attentiveness refers to not being heedless of what is required of him in prayer, whether obligatory or recommended, and not being distracted by his surroundings or anything else in the world. Allah knows best, and He is the Grantor of success.