Your brother has Saturn conj MC while your Saturn is still in 9H. Saturn will hold more weight in his chart than your chart. On the flip side, you have Chiron conj IC and Moon conj DC. These things will be more significant to you.
There are also a lot more going on with your MC and Asc. You will be more preoccupied by your sense of self and your public image than him. Not to mention your Asc is at critical degree too.