Hang glider & Rogallo glider

There is not much difference between Hang glider & Rogallo glider from my research , as the shape of the rogallo wing work similar as the hang gilder.The difference is the effectiveness of the airfoil hang glider and the rogallo gilder.The hang gilder have a greater trust and lift , but the rogallo gilder do not give much lift and trust compare to hang gilder.Rogallo gilder is to reduce the impact for landing.