An oblique face is a slanted version of a typeface whose character designs remain otherwise unchanged. Unlike italics, it does not introduce more script-like letterforms or other redesigned details. section 8.1.3
Choosing between oblique and italic
Use an oblique style when you want the existing typeface to lean without changing its character designs; choose an italic when a more cursive, redesigned appearance is intended. section 8.1.3
Compare the original typeface with its simply slanted oblique form. section 8.1.3
