Yes, the blunt blades affect the dough differently. Also, the 90-seconds is just an average. There are some flour types that may require less than 90-seconds mixing time, and if you are using a reducing agent, such as PZ-44, I can assure you that 90-seconds if too much time. It’s best to adjust the mix time so you get a smooth dough appearance, at that point the dough is sufficiently mixed for a pizza dough.
Tom Lehmann/The Dough Doctor