Head Alpha

Alpha was a HEAD family in its own right, sold in Pro, Elite and Motion versions, and HEAD describes the Speed as its successor. The two are kept apart here deliberately: a Graphene 360+ Alpha Pro was sold and is still searched for by name, so folding it into the Speed would tell a reader looking for it that it never existed. If you are comparing an Alpha against the current range, the Speed is the line that carries its position and its tier names, and the closest equivalent to an Alpha Pro is the Speed Pro.