Klopp's version is basically all-out attack - the ball always goes forwards and is not passed from side to side. This means that Dortmund could attack in that crucial transitive phase between attack and defence that creates opportunities, and is why Dortmund could go two or three goals up in a short period of time, putting the game to bed. Just like that Liverpool 5 Arsenal 1, although admittedly two of those goals came from shocking defending at set pieces.