what is the difference between a "Shout Box" and a "Chat Box"?

[rnmcd]

I have seen different vb forums with these but I am not sure if they are the same thing or not.:confused:

[Jose Amaral Rego]

It is like to in saying, what is the difference in vBulletin and Invision Power Board or a rose by any other name.. Just a name until you can give the link to both items.

[rnmcd]

I have been informed that a chat box is the featured-down version of vbshout box.

Does anyone know if the vbShout Box is a resources eater?