I read a few articles about Qbism, but feel like I don't understand the difference from Copenhagen. One author claims the difference is that each observer has his own view of the world (and own probabilities in qbism). I thought that was also the case in Copenhagen. E.g. the old Wigner's friend setup when the friend makes an observation and updates his probabilities accordingly while Wigner, before observing the larger system, still has a superposition with less "precise" probabilities (until he measures and updates). Is qbism somehow different here? Is there another example that clearly makes the distinction?