Underworld - Gold Preview @ RPG Codex
Underworld Gold has been previewed in a short article at RPG Codex:
One thing that is new in Underworld Gold are the avatars of your characters. Every combination of race, gender and class has a unique portrait, making it a total of 48 different character sprites. These avatars, together with other overhauled graphical assets, maintain a good standard and are a lot more professional and consistent than the graphical assets used in the old version of the game.
The interface has also been graphically enhanced. It retains the same layout as before and it is still just as keyboard and/or mouse friendly. As you can see in the comparison shots below, the Gold version preserves the ability to assign hotkeys to everything that you can click on. Really handy, I must say.