The main difference between these two is the speed by which they transfer the data. USB 1.0, 2.0, and 3.0 provide speeds of 12Mbps, 480Mbps, and 640Mbps respectively. On the other hand, Gigabit Ethernet ports also provide three different speeds such as 10Mbps, 100Mbps, and 1000Mbps. The third type of Gigabit Ethernet port is the fastest to transfer the data.