Helvetica font is well recognized by its rounded but minimalistic character design. The Helvetica Inserat Roman changes this a little. This is because this font has more edges, though the edges are not completely sharp and still maintain the simple style of the original Helvetica.
This font is also a favorite of graphic designers and advertising agencies all over the world just like the original Helvetica. It is also suitable for signage and different items like restaurant menus, price tags, description tags etc. It adds a little extra something in terms of visual appeal to the otherwise overly simplistic and minimalistic original Helvetica.
See also: Free Helvetica Font: Helvetica Normal