That is a hard one. They only thing I could come up with off the top of my head is that Sweden a bit more consensus oriented, which could be quite good for creating commercial successes. Like for example I would say that the Netherlands has a stronger electronic music scene, but the big names are still a bit less commercial than Avicii and Swedish House Mafia. Maybe that is because between the Netherlands and its neighboring countries you have a pretty big market. While for Sweden it is Sweden and then the world.