Shiraz and Syrah are interchangeable names for the same dark-skinned grape variety when viewed in terms of DNA. Originating in the Rhône Valley, this grape dominates plantings in the northern section of the valley. The name Shiraz is commonly used in Australia and certain regions of the New World, particularly those with warmer climates. The stylistic differences between Shiraz and Syrah wines are often distinct, contributing to the enduring dual identities of this grape variety.