It is common for parents, intentionally or not, conscious or not, make comparisons between their children. Keep in mind that each individual is unique as a human being and as a child, therefore we must avoid making comparisons between them.
Comparisons between brothers not only contribute nothing but help to be some tension between them.
Parents often unwittingly, often comparing notes from school, behavior and even the tastes of their children. Be very careful to avoid such comparisons.
Do not compare siblings
It may even happen that one of the children is the copy that you get the best grades, best behaved in relation to another that has a lower school performance.
All people have a natural tendency to compare, is part of our nature. It is necessary to make conscious and visible this condition to avoid any comparison between our kids.
One issue that both parents should talk to each other frequently and seen as a way to achieve a better upbringing of all children.