Are all routers basically the same?

No, there are many different speeds and other variables associated with routers. Most commonly, the speeds are 802.11, G, and N with variations of those. Those are listed in order of speed with N being the fastest. However, the speed will also depend on the device using the router. For example, if a laptop with a G receiver is on an N router, it will only get G speed.

Which brings me to my next point: There are also wireless and non-wireless routers. The above information only applies to wireless routes. As for wired routers, these are more similar. The only thing you will have to watch out for is the connection type your using. if you have dial-up internet or a 56k connection, you will need to buy the appropriate router. Same thing goes for a Ethernet or cable connection.

Another thing to look for is the number of ports available to use. If you are simple running 1 wire to 1 computer, all routers should have this function. However, if you are connecting multiple computers or sources to it, then you will need to make sure that there are enough ports to accomplish your needs