The RT311 has one output RJ45 port to plug into your hub/switch you already have. The RT314 has 4 output RJ45 ports as it has a bult in 4 port switch. So if already have a switch get the RT311, if not get the RT314 and you can hook up 4 computers to it. If you already have a hub the RT314 would be the way to go also as the built in switch would be better then the hub. So, the routers are the same thing, one just has a built in 4 port switch.