I wonder what the optimal similarity/difference threshold is for successful co-founder relationships. You'll want to be different enough so that you can merge y

I wonder what the optimal similarity/difference threshold is for successful co-founder relationships. You'll want to be different enough so that you can merge your expertise and cover more ground, but then if education / background / philosophies / life stage are too divergent, as in the case with you being in uni and your co-founder running a family, you're likely to disagree on major issues or have different levels of commitment/skill.