What does Macbeth have that Romeo and Juliet doesn't have?

Answer 1

That is the school summary answer. Both plays are much more complex than such a simplistic answer would indicate. Macbeth is not always selfish. The factors leading to Romeo and Juliet's death are multifarious, so much so that it is pointless to try to point to any one factor leading to their tragedy.

Also it doesn't answer the question.

Macbeth is a nobleman, the cousin of a king. Neither Romeo nor Juliet is of a noble family (Rich families, yes, but not noble.) Macbeth has concerns and cares in the larger public world. He is a soldier and an advisor to the king. Romeo and Juliet are entirely wound up in the world of the two of them. The world outside is a threat which they are unable to keep from getting to them and destroying them.