[Vorbis] Difference between "SVN trunk" and "low-memory branch"

[Henric Kärnhall]

At the Ogg Vorbis page for developers (http://xiph.org/vorbis/) one can
find this line:

"The Tremor reference decoder provides an integer-only implementation of
the decoder for embedded devices [SVN trunk] [low-memory branch]"

I'm interesting in using the integer-only implementation off ogg vorbis
but I wonder: what is the difference between these two downloads? (SVN
trunk and low-memory branch).
They seems to contain different files and different versions of files.
Is there a difference in functionality, memory usage and/or cpu usage?
Is this described somewhere? My aim is to port it to the C6416 DSP from TI.

/Henric