Blade difference

[lawman0210]

So finally going to take my P3 put but I am confused on the blades. I have about 20 pair. Some I understand the 9443 go on early P2 and the 9450 later ones and P3 but I also have 9450 with plastic hub and some with metal hub. Which is best for p3?

 

[bbfpv]

9450, plastic hub.

 

[happydays]

Plastic hub only. They're not transferrable between the 3 & 3 apparently.

 

[L.Chaney]

2&3