There is:
USB 1.1, which is 12 Mbits/sec
USB 2.0, which is 480 Mbits/sec
Firewire, which is 400 Mbits/sec
Firewire800, which is 800 Mbits/sec
If you're asking about USB 2.0 versus Firewire, USB 2.0 is technically faster, but due to the overhead, Firewire is faster for file transfers and is favored for camcorder use. See
http://www.usb-ware.com/firewire-vs-usb.htmFirewire uses a different chip than USB and costs money to integrate. It's also not as popular.