WENO comparison, part 2

Here is another 2D Zalesak disk (an approximation anyways) using a Semi-Lagrangian backwards advection with a Runge-Kutta 4 on a 100x100 grid (h=0.5, steps = 128)

Here is a 2D Zalesak disk (again an approximation) using a Finite Volume WENO (3rd order) on a 100x100 grid (h=0.001, steps = 6400)

Thoughts: Not many at the moment. Too many things left to test.