
Canadian whisky is usually a light-bodied blend: a near-neutral base whisky, mostly from corn, with smaller amounts of fuller flavoring whiskies, often rye.
The best swap, in the same amount, especially in stirred drinks. It gives a drier, more peppery drink.
Also works and gives a richer, rounder drink.
"Canadian whisky = rye whiskey"
In Canada "rye" is a historical name for the local whisky, not a mash bill: there may be almost no rye in the bottle. Used in a recipe written for US rye, it gives a softer, sweeter drink.