PW vs Dual Voltage.
In order to use a motor in a Part Winding start, you must have the windings configured for that, and be able to bring 6 leads to the motor. That's also what you must do for a Wye-Delta start, which is why they are often confused, bu5t they are different. In a PW starter arrangement, the Code requires that each set of winding have separate OL's and possibly separate OCPDs, you have to read article 430.4 very carefully and apply it to your exact situation to understand if the exception applies. Unfortunately, many of the PW wiring diagrams from motor mfrs and some starter diagrams leave that part out because it's not actually their concern. So be careful using ONLY that diagram.
A dual voltage motor is different, although similar. Here in North America, dual voltage will mean there are two sets of windings as well, and you connect them differently for the different voltages, but you only bring 3 leads out to the motor, one set of OLs and one SCPD based on the current at the voltage that you use. The voltages will be 230 or 460V, a 2:1 ratio.
In other parts of the world, "dual voltage" is different because for them; the (nominal) low voltage is 230V and the high voltage is 400V, so the difference is the sq. rt. of 3. Therefore if you connect the motor is Delta, it runs on 230V and if you connect it in Wye (Star) it runs on 400V. That doesn't work for us.
Many motor mfrs sell motors where ALL of the motor coil leads are brought into the connection box, so you as the user can decide in the field what type of starting method and / or voltage you want to use. You can use Wye-Delta, PW, or Full Voltage starting, then you can use it at Low or High voltages. You can ALSO reconnect the same 12 lead motors for dual voltage in IEC world, but you cannot do PW starting for that, which is why they don't have that option.