Is it better to have a brother or a sister?

It doen't matter wheter they are a brother or a sister. It is about the love you have for them and the love they return.

If you truly want to know here are perfect combanations.

Boy+Girl - 1Yr difference between both of them.

Boy+Boy - 1yr difference between both of them.

Girl+Girl - 5yr difference between both of them.

Hope this sloves your problem!