In List Definition, in elements.xml ListTemplate element has EnableModeration attribute.
From MSDN:
EnableModeration - Optional Boolean. TRUE to specify that content approval is enabled by default in lists created through the template; otherwise, FALSE.
Also in schema.xml, the List element has ModeratedList attribute
ModeratedList - Optional Boolean. TRUE to require content approval for submitted items.
What is the difference? Which one should I set to have Approve/Reject button available?