Really am happy to get differences between Mathoverflow as one of the most important interactive website include researchers in mathematics where they are working to provide proofs and solutions for interesting problems in mathematics in the same time Also if we look to Researchgate as one of the important interactive website we w'd find the same Role as MO does , But My questions here is :
What is the differences between Mathoverflow and researchgate? , I think many researchers prefers to use Mathoverflow than researchgate but in my opinion reasearchgate is more academic than Mathoverflow