Why did Umar ra say this to hafsa ra

The full hadith is here enter link description here My question is about these parts of the hadith > don't be tempted to imitate your neighbor (i.e. `Aisha) in her behavior towards the Prophet), for she (i.e. Aisha) is more beautiful than you, and more beloved to Allah's Messenger (ﷺ). > I then said, 'I went to Hafsa and said to her: Do not be tempted to imitate your companion (`Aisha) for she is more beautiful than you and more beloved to the Prophet.' The Prophet (ﷺ) smiled again. What did Umar ra intend by saying this to Hafsa ra and why did the Prohet SAW ?