I constantly get flashed from people with the zenons on my 182. At 1st I got all paranoid but now I dont even bother about it.
As for a difference I have to agree with the majority here and say zenons are a hell of alot better, they give off a brilliant white colour compared to normal crappy halogen bulbs.
The thing I love most is when you 1st turn them on at night, as its an awesome blue colour for half a second then it fades str8 to that almost daylight shade of white, but still got that blue tinge around the edges. Which shows up even more against the reflection on roadsigns than anything.