Same shafts irons and woods?

I went to get fitted today and the assistant used their own machine and the Mizuno Swing DNA system, first machine said I was regular shaft bordering on stiff but the Mizuno said best shaft for me was a Dynamic Gold S300. My question is should I get stiff shafts throughout my set? i.e. Drivers and hybrids? The assistant said yes but I want a second opinion.

Thanks Barry

Each companies shafts are different and there is no standard to what is stiff, reg, etc. Best to try different shafts on a launch monitor if possible.

I would have to reccomend geting a proper fit for the shaft in your woods and driver. I know that several people on here play a stiff flex in their driver and regular flex in their irons. I actually found that a regular flex in my hybrid works better for me than a stiff and I have stiff in my driver.