I'm grouping them in the broadest sense. Indeed there are differences, some major, some minor, between all these directors, and within each directors' body of work as well. Even still, director like Jia, Tsai and Weerasethakul still use a realist style to film even the most mystical or metaphysical elements of their films (granting the animation in The World can't be realistic).
But they all share an opposition to mainstream filmmaking style, I think, even if some of them are more magic realist than purely realist.
It's very possible that I just haven't seen enough of these "neo-neo" films to make this claim, or that these films' rejection of the kind of magical elements in Tsai/Jia/Weerasethakul is a bigger determinative factor in what kind of film they are than the broader, international technique.