These things are nice to read, but the problem is that they're dated. Both the r3mix page and this one haven't changed, while the encoders have evolved a lot. To learn how lame has evolved, you just have to read their ChangeLog. No equivalent document seems to exist for Fraunhofer.

*sigh*

One of my projects for this weekend is going to be performing some A/B tests, encoding the same tracks with lame and Apple's Fraunhofer coder, burning out a CD, and then comparing both with the original data using good headphones.