Here is an excellent video comparing IBM WebSphere Liberty Core 8.5.5 with Red Hat JBoss Enterprise Application Platform 6.2:
Even though its a short video but the summary is shown in snapshot captured from the video:
A complete TCO analysis on JBoss EAP vs IBM WebSphere is available here. A quick summary from the paper is:
We compared these products as objectively as possible, utilizing people that were expert in each, and concluded that JBoss EAP is the clear winner over WebSphere AS ND with a 50.91% lower TCO, easier application development characteristics, noteworthy operational ease-of-use advantages, and a smaller footprint.
And another detailed comparison is here.
Download Red Hat JBoss EAP 6.2 today and take the red pill!