Comparison between Geronimo and Websphere Community Edition

[Bruno Melloni]

I am setting up a Eclipse 3.2.2 development environment for applications
that will be eventually deployed to Websphere 6 and 7.  I narrowed down
my choices for the J2EE server to Geronimo 1.1.1 and Websphere CE 1.0.  
 
I found lots of information saying that Websphere CE is *based* on
Geronimo, but no details on what is different.
 
Can somebody please point me to a comparison between the two?