Plastic nozzle or metal nozzle with wooden handle:
The plastic nozzle is naturally lighter in the hand (weighing about 200g)
The metal nozzle with wooden handle is heavier (about 500gr.)
In the plastic nozzle is more condensed than in the metal nozzle collects.
This is only important if with delicate fabrics such as Satin, silk, etc. are working.
The plastic nozzle can break faster (eg by falling down) But if there is a spare part for us and is easy to replace
The metal nozzle is more durable and is often taken for frequent inserts with different people.
In the metal nozzle with the wooden handle, less heat than the plastic nozzle developed (important for long duration missions)