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Another question that collectors often ask is: What is the difference between a full pane (sometimes just called a pane) and a souvenir sheet? Granted, it can be a little tricky sometimes to tell the two apart. For the purposes of understanding the differences, this article will compare a full pane to a souvenir sheet that Canada Post issued for the same stamp: Canada stamp #1813 (full pane ) and #1813i (souvenir sheet).