[orca-list] speech-dispatcher vs gnome speech services vs other voices?

[Justin Mann <w9fyi cox net>]

Hi,
I am quite a newbie to using orca with unix, and some of the concepts
that go along with compiling from source, but there appears to be
soemthing that i am not getting here.  What is the difference in using
speech-dispatcher vs festival verses gnome speech services?  
As of rigth now I find both festival and the e-speak gnome driver to
sound the same whether i am using either speech-dispatcher or just the
traditional gnome speech driver.  What am I missing here?  
Finaly, am Ii expecting too much at this point to be able to use gnome
with orca, and have all my computing needs met?  I apologize for what
may appear to be rather obvious statements, but I need some help...
Justin