That's fantastic. That experience will serve you well later in life. As you why you act more mature than your brother, that's because it takes guys a bit off time to catch up with girls in terms of maturity. ;)
Enjoy your youth while it lasts. You will be loaded with much more responsibilities in just a few years. You are much more literate than how I picture the stereotypical 10 year old.
And since I'm on this thread, I might as well reply. I am currently 17 years old. My age is not something I...