Thank you for asking the question.
Not only is Aquila clearly marked as a Puritan Great Migration Project profile, but he is also project protected. Changing his birth date would be considered a fairly major change and should be discussed with the project before editing. This is easy to do by adding a comment to the profile. Many people monitor the comments left on PGM project profiles. Unfortunately, your source "FindAGrave" is not to be relied on. The plaque in the picture was done in 1924. Newer research shows his baptism in 1619/20. Before editing project profiles (actually any profile), one should read the biography, which in this case clearly documents the correct date.