feta and emmentaler font

[Federico Bruni]

Hi

What's the difference between the two fonts?

This appendix is a bit confusing, since under the title Feta fonts it 
says that the following symbols are available in the Emmentaler font:
http://www.lilypond.org/doc/v2.19/Documentation/notation/the-feta-font

Is it explained in the doc?

In usr/share/lilypond/current/fonts/otf I see the Emmentaler font, no 
Feta font.