What is the difference between Italic and Oblique?
In the purest (type designer) sense, an oblique is a roman font that has been skewed a certain number of degrees (8-12 degrees, usually). An italic is created by the type designer with specific characters (notably lowercase a) drawn differently to create a more calligraphic, as well as slanted version. Source: http://stackoverflow.com/questions/1680624/font-style-italic-vs-oblique-in-css
Oblique is very similar to italic,but less supported.