I can understand what must be going through your mind due to some of the tech articles you may have come across.
In real world, both are two different products, both with definite purposes and goals.
To simply the matter let me put this way:
A Switch is used to connect devices with in a locations (given all the standards of Ethernet, STP etc apply) and a L-3 Switch is with an additional capacity to understand Routing Protocols also and in some cases may even connect WAN Links also read 6500 Series Switch
On the other hand, Routers were designed primarily to connect two different locations over a WAN link (T1, FR, ISDN etc), however these days they may additionally host some SWitching capacity also (read 3800 or 3700 Router ESW NM).
Hope this may be quite helpful to you, if yes please do rate.
We are pleased to announce availability of Beta software for 16.6.3. 16.6.3 will be the second rebuild on the 16.6 release train targeted towards Catalyst 9500/9400/9300/3850/3650 switching platforms. We are looking for early feedback from custome...