If they want to protect their corporate name, it would be in their interest to federally incorporate, because once a name is given to a federal corporation, they could use that name throughout Canada; whereas if you're provincially incorporated and you want to go into another province, you would have to register that name, but if that name were already taken in that province, you'd have to change your name.
On November 4th, 2009. See this statement in context.