There were only two of us, my brother and I. I only have two girls. No middle at all. But yes there are differences. My parents were more relaxed with my brother. I pushed to do things, he got the benefit. I tried for that not to be the case with our girls, but none the less it is. Your parenting style changes as you parent and so there are differences.
If there is a god, I want to believe that there is a god. If there is not a god, I want to believe that there is no god.