The difference in documentation quality:

`man ascii` gives you a single text file from section 7 of all the ASCII 7-bit codes, organized in easy tables by octal, hex, decimal, & binary values. Printing it is 3 pages.

`info ascii` gives you a book helpfully divided into 20 chapters of 12 sections each in an unique hypertext interface that, if marshaled into a printable form, yields a college textbook tome that still doesn't tell you what you need because it's buried.
:V