On Fri, 14 Dec 2012 14:14:23 +0100, Martin wrote:

A router will cost more but will increase the wireless capacity
(bandwidth) of the network.

How? A router doesn't have any wireless capabilty. Unless you are in
marketing, in which case it probably has a network switch and
cable/xDSL modem in it as well.

Both my routers provide wifi and 4 physical ports

In which case you are using the marketing "definition" of "router". A
real router knows nothing about WiFi, xDSL, cable, switches etc, it
simply routes packets from one port to another (or not) based on set of
rules. How those packets arrive or depart from its ports it cares not a
hoot.

--
Cheers
Dave.