The difference is not day and night because the Asus drivers are pretty excellent as they are.
UNi drivers improve on them by reducing latency and fixing app issues that attribute to slightly longer Windows boot and resource usage. I'm using the C-Panel only version since I output by RCA to my stereo amp and they're brilliant.
After a stock issue *Different company as I was overseas* I decided to get the Phoebus, Arrived, Installed and wow, This thing makes love to my ears ^_^
Sadly the UNI drivers don't support the Phoebus though.