Most distros are based on other distros, basically making them modifications of their parent distros. In most important ways, these child distros behave like their parent distros. They mostly use the same package management and packages can usually be easily installed from the parent distros repository.
There was a question addressed to me recently, after publishing the "Divergence in the distros" article. The person asked me: "You tested many distros so you maybe have some pros/cons seen on distros to share." That made me think about the most perfect distribution I'd like to get, ever. Let me share these thoughts with you.