With regard to process, I think there is a difference, in that new initiatives typically need policy approval at cabinet first. You need to go the memorandum to cabinet route. You need to explain why you need a new program, a new policy, a new initiative.
Existing programs tend to be more in the Treasury Board ambit. They tend to be changes to existing parameters of a well-known program, so you don't need the policy cover, new policy approvals. However, you do need funding approvals, and the funding approvals require Treasury Board scrutiny. It tends to be treated differently internally in that way.