[seumars]

The difference in shape between specific characters is one thing, though it's just as important to took at the typeface in use in body text, at different sizes, different line length, and so on. The fact that people here compare typography to winetasting instead of acknowledging the fact that it's a serious and intricate skill is honestly baffling and rude. Anyway, take a look at the "gestalt" example here, where you can see how Helvetica is much wider, has bigger spacing between characters and looks almost square in comparison to Neue Haas Grotesk. The rest of the article is very interesting as well: http://www.christianschwartz.com/haasgrotesk.shtml