Before selecting either one, consider your bandwidth requirements. USB1.1 is obviously much slower than that of USB2. It doesn't matter what your comps USB is rated at, what does matter is the rating of your router/switch/hub or whatever device you may have in your network. The slowest link in the network will most likely be the common denominator, therefore you may want to consider the ether connection (100Mb). If you really need some high end throughput, consider a gigabit router/switch but I would recommend staying away from the USB variety unless the manufacturer specifically states that the USB throughput is USB2.
Just something to think about.