original xine use FIFO Buffers, xine-net use network-sockets.
this is a streaming version from xine-plugin without streamdev, no bug release.
xine-plugin runs on VDR (Server), xine-lib and xine-ui on client.
I think you misunderstand it:
is there a changelog from version 0.7.4 to 0.7.5?
AFAIK the only change is the new vdr-xine version. Look for it's changelog.