Good grief, how irrational! You and your sister are two separate and distinct persons, as are any two people.
(I might be tempted to research birthdays and find a famous person with a birthday near mother's and ask her why she isn't like that person.... Sorry, the brat in me is showing)

I am different from all my siblings and one in particular is very different from the rest of us. That one has been driven, motivated all his life. He knew exactly what he wanted to do with his life from the time he could talk and he did it and lives a completely different lifestyle than the rest of us. In addition, he was the 'golden child', the only one recognized by my mother as worthy, successful, etc. He is not without his own personal problems and a former therapist mentioned that his being given the 'golden child' label early in life was something he had to deal with also. His failed marriages and estranged children might be the casualties... I don't know.

I noticed that the super-energetic often are very successful in business and that I do not have that in me, but I can be successful in my own way.

I also have know people who are so afraid to slow down and think about life that they keep themselves super busy as a defense. They may be afraid to take the time for introspection, afraid of what they'll find, so they use busy and involvements to cover up feelings of inadequacy.

You are the best you that you can be.

Laid back is a nice quality and in life I'm drawn to someone like you rather than someone like your sister.

I'm sorry your family says hurtful things that are short-sighted and judgemental. I'm glad we all get to choose the way we want to be.