Onyx confusion.

I'm not sure what some of the functions in Onyx do, mainly relating to the cleaning section.
Would deleting the cache of the System Preferences Panel, delete the setting of made there?
What happens when you delete the front cache?
Same goes for the Logs cache?
System Cache?
User cache?

Basically, I understand the Internet cache, and a few others, but mostly I don't know what effect deleting many of the cache will be. I know I could just ignore it, but I want a better understanding.
Would deleting the Dock Icons cache, remove the dock items I moved there and restore it to it's original form?