In terms of constitutional thinking, the American model stresses the written black and white letters fundamentally, while Canada is very British/Anglo in the sense that "evolution of the unwritten, but important, part of our constitution" is of paramount importance.
Like New Zealand or Britain itself but like the United STates or (to an extent) Australia, you can circumsvent the constitution by piecewisely enactment whatever "fixes/remedies", and when this becomes fait accomopanli, it forms the coutnry's constitutional arrangements.
(No more Olmert! No more Kadima! No more Oslo! )