I was curious about the difference between Maths StackExchange (MSE) and Mathoverflow (MO), because it was never obvious to me. After a couple of minutes it became clear that MSE is aimed at anybody with questions in maths, while MO is dedicated to research level questions. However, while MO claims "it is for professionals", by the nature of the website anybody can ask questions.
This directly lead to two questions:
Wouldn't MSE be superior even for higher level mathematics? If someone has a very specific/difficult question, I feel that asking the website with more people is a better bet, as it is more likely to be seen by someone familiar with the ideas being discussed.
How does one decide whether or not a question is "high level enough" for MO? For example, I'm still a student, but I'm relatively knowledgable in a field we call "Generalised Inverse Limits" (an approach to continuum theory, in topology). I'm expecting to publish sometime this year. However, I'm most definitely not a "professional" or an "academic", while some of my questions may be "research level". In this sort of scenario, what determines whether a question should be posted here or on MO?