Hello. The main difference between the two models is the design details and structure of the sole rather than the sole height. Base Design and Structure: While both models feature a thick and high base, the Eclyptix 2000 boasts a simpler and more classic thick base design. The "Crazy" series, on the other hand, typically features more complex, multi-layered, and performance-oriented sole technologies developed for sports like basketball. Therefore, the shape, contours and material of the soles differ from the Eclyptix 2000. In short, the difference is not in the base height, but in the design philosophies.