Original: Although this biome is correctly named Taiga, the term Boreal forest is usually used to refer to the more southerly part of the biome, while the term Taiga is more often used to describe only the more barren northern areas of the Arctic tree line.
Simplified: In Canada, boreal forest is the term used to refer to the southern part of these forests, while "taiga" is used to describe the northern areas south of the Arctic tree line.