Difference between Sigma 30mm 2.8 and its replacement??

Sigma is replacing most of its lenses under new marketing categories and enhances the quality of their construction, or at least their exterior appearance.

--
"Nobody is allowed to photograph me in the street or draw me in a painting or photograph my home, unless I give my permission.
"No one is allowed to miss to photograph a decisive artistic moment or whatever attracts their interest and deliver these images to society, even when such images are made against the wishes of the depicted person or property owner."