Depends. I do not know what the typical bottle size in Canada is, but in the US it is 750ml, and in Europe 700ml, about a 7% less difference in volume for price. But, a lot of times when you find the liquor you are looking for in a duty free shop, it may very well be in a 1000ml bottle, so you kind of have to do a litte bit of math to figure out the cost per volume in order to know if it is worth it. IMHO and past experience I typically find the same particular liquor at about the same price in duty free as at home here in the US, but when you factor in the extra volume (remember price per volume) it is well worth the effort. Usually.

j