Okay, this is a place to post the differences we find between the demo and full game...
1. Music is different. Nice.
2. Plugen quest doesn't give the ragebox. D'oh

3. Not having ragebox makes the early game MUCH harder, especially when you're playing on Hard like I am.
4. Not a difference but a reminder. If your game lags at all
turn anti-aliasing off. It slows my game down quite a bit.
5. I can't beat the tougher Greenwort enemies without the ragebox on Hard. I have 10,000 cash but I am yet to defeat the head werewolf, tent guards, shipwreck ghosts etc.
6. I had a nasty surprise with the stupid plants. I came across a group of 4 x 200 plants! Reload.

7. I am going to have to leave Greenwort to get the ragebox, but I am scared.