A brief one line at the beginning that SoF has only object-server implementation would be nice to have before jumping into the differences.

Also, an example comparing file path naming conventions would be nice too :)

~~~
curl -i http://vm1:8080/v1/abc/c1/o1 -X PUT -d'Hello'
~~~

Swift vs SoF
~~~
/mnt/sdb1/./2/node/sdb2/objects/981/f79/f566bd022b9285b05e665fd7b843bf79/1401254393.89313.data
/mnt/gluster-object/test/abc/c1/o1
~~~