Ask HN: What frank discussion would you have with these two types of co-founders

Consider these two scenarios: 1. You decide to start a company with your childhood friend who you know very well. 2. You decide to start a company with a person you met online just a few weeks ago. You both click and decide to work together. In both of the above scenarios what frank and candid discussion would you have with your co-founder before starting the company? How will the discussion in these two scenarios differ keeping in mind that one is a childhood friend and the other is a stranger?