What is the difference between different configuration files of WildFly

• standalone-full-ha.xml 
• standalone-full.xml 
• standalone-ha.xml 
• standalone.xml

standalone.xml ->JavaEE web-profile 

*-full supports the full javaEE stack.

*-ha adds the cluster features.

You can use a diff utility to see the exact differences, mostly in <extensions> part.

To start with different cofiguration file:

./standalone.sh -c standalone-full.xml