These are Serif fonts, and Sans Serif fonts.
Serif fonts are generally more formal looking, and quite often look old-fashioned and traditional.
Sans Serif fonts are the opposite. They look informal, friendly, soft and also more modern.
The movie ‘Rocky’ uses a large, bold, Sans Serif font. The Sans Serif font (Franklin Gothic Heavy) makes the title look soft and friendly, whereas the bold capital letters make it look tough and strong. This represents the character Rocky in the movie, who is a gentle, kind and caring man, but also very tough, strong and stern.
This shows how much the type of font can reveal about a film just by looking at the poster or seeing the opening credits.