newbie to weblogic/websphere

[webcortech]

is weblogic similar to websphere? I'm not really a java programmer, or anything of that sort... I am just trying to understand the network logic or layout of these systems from an admin point of view. For instance..

If I was designing a network with weblogic, I would have from top to bottom:

Multiple ISPs
Connected (2) Redudant routers
Connected to (2) firewalls
Connected to (2) Layer 3 switches
Connected to (2) Content Switches
Connected to my Weblogic Farm
Behind my Weblogic Farm are
(2) Firewalls
Connected to (2) Layer 2 switchs
Connected to my database.

Could I substitute Weblogic with Websphere in this scenario?

Thanks!

Tommer