My brother and I

My brother and I are very different, but we have features in common and we get along well.
He´s very quiet and I´m a lot more outgoing.. My brother is four years older than I am, and he studies medicine.
I like going out with my friends but my brother prefer going to her girlfriend house.
People say I look different than my brother because he is taller than me. However, we have features very common in characters.
But regardless all the characters, we get along well and we are very close.