The answer to 'difference between soffit' is that soffits and fascia are both important components of a roof system, but they serve different functions. Soffits are the horizontal panels that run underneath the roof overhang, while fascia are the vertical boards that run along the edge of the roof.
Soffits provide ventilation for the attic space, allowing air to circulate and preventing moisture buildup. They also help to protect the roof structure and prevent pests from entering the home. Fascia, on the other hand, provide a decorative and functional edge to the roof, protecting the roof structure and gutters from the elements.