SinoSoldier
Colonel
You don't know that they share either the same fuselage or the same motor. Also, a "verbal" statement is as good as no statement. In other words, nothing has changed.
A new missile with a drastically different fuselage + motor would warrant a new designation, at least a departure from the "HQ-9" family. Make of the verbal claim what you will, but it's likely more accurate than the guesstimations people are doing on this forum.