What would you say are the biggest differences from playing Australian opponents to playing European? Map selection? Skill level? Decision making? Aim?

I think the main difference vs your average skilled opponent is they will generally specialize in one map so they will be able to beat u on one map even if they are not the greatest all-round player, which is obviously a good thing so u can learn to work on one map at a time, and try to play that alot vs a certain player. I find in aus, you are either good at most of the maps or good at none and ok at ztn ;P. Having said that i also think Aus is not as far behind Europe as people would have u believe and our top level players are quite good!