My son is the same, up early and ready for school by 7am and almost no complaints doing chores.
Younger daughter, fark, I need to drag her outta bed and constantly remind her to, eat breakfast, get dressed, brush hair, bring dirty clothes to laundry, go to the toilet, stop talking etc. And chores actually makes her cry, crocodile tears but still puts it on. Her mum's the messiest person I've ever know so there is that genetic transfer maybe of traits, I don't know I'm not a doctor of anyrhing other than my navel.
My kids are opposites.