Can it be said that the Messenger of Allah, may Allah bless him and grant him peace, was less bold than Umar ibn al-Khattab in the manner of their hijrahs from Mecca to Medina? And what is the interpretation of this difference between the two hijrahs?

The famous report about 'Umar ibn al-Khattab's migration openly is weak in its chain of transmission. The correct account is that he agreed with Ayyash and Hisham to emigrate secretly, but Hisham was delayed.

The Prophet, may Allah's prayers and peace be upon him, was the bravest of people, yet he took the means of migration secretly because his actions are legislation for his Ummah, and this indicates the combination of taking means and relying upon Allah.