Fundamentally, I don't believe there are differences, if by that you mean where in this case the element of cabinet confidentiality is being invoked, whereas on that occasion the element of national security was being invoked. That difference doesn't, in my view, affect the outcome. The outcome is the same in that the Speaker indicated in his ruling that the House is entitled to receive the information it seeks from the government.
On March 16th, 2011. See this statement in context.