Profile atk/hp is just the atk/hp of your soul. Go back to the character edit screen and you'll see the numbers are the same. Arthur has a +4000 ATK bonus from leveling up so she has higher atk base that the rest of the souls.
Both difficulty drops the weapons and the eidolon. Though each element only has 3 different weapons, 2 being hp and 1 being atk. Like the dark raid boss only has a gun (atk), a ax (hp) and a lance (hp).