In the US, head of state and head of gov are the same (the President).
In Russia, the head of state is Putin. He's not officially head of gov, but c'mon, we all know who controls the show there.
In Canada, the Head of State is Queen Elizabeth II. But for all practical purposes, Justin Trudeau holds both rows. It's not like the Queen is handling Canada's foreign policy. She technically has the power to dissolve Canada's parliament, but it would be hard to imagine her exercising this power. When foreign leaders visit Canada, they aren't going to see the Queen, whereas they might if they visit the UK.