Dust collector dual motor or single?

Hi all.
This is my first post on your forum.
I have a question for you more experienced people.
I am assembling a homemade gyro air g 700 dust collector.
I had such an idea, I don’t know how justified it is.
Two 2 hp motors can be connected to the collectors or a 4 hp motor ?
This is of great importance, since these motors must be operated from a 220 volt network.
Maybe someone has experience with two blowers in parallel.
Two centrifugal turbines were assembled and tested for performance.