red is stronger and blue is weaker isnt that it. difference in W number.
Red is used in naples in really hot days when blue bag dont hold up for the test.
I think pizzaiolos many of them rather change flour than recipie, so they can do like they always do.
Most good pizzaiolos in naples that i know dont measure water they go by feel also. They dont understand when i talk about 1 % more water and stuff like that.
You can make equal good pizza with both flours but with different recipies. I think....
Lets say 10-15% more in ball with the red bag would be my guess to achieve the same result. Very wild guess