Makita 40V Impact Driver VS Makita 18V Impact Driver

We compare the Makita 40V Impact Driver VS Makita 18V Impact Driver. New vs old. We also bring in the Hilti to see how it goes. I bought this for my Drywall Plastering & Painting business & later decided i would rather give it to Eugene. Hes had nearly every model of the Makita Impact driver range.