Edited sentence: Another major difference is that the Wi-Fi works on the crowded spectrum of 2.4GHz (along with most of the cellphones, bluetooth, medical equipment, and even the microwave ovens), while the Wirless USB is based on UWB which is using a very broad spectrum (3.1 - 10.6 GHz).Both technologies are aimed for different usages, Wi-Fi is intended as Ethernet cable replacement, e.providing wireless internet access, while the Wireless USB is intended to remove the cables from USB based PC peripherals