What are the benefits of not killing prison guards?

After struggling and failing several times to get a grasp on The Witcher 2's stealth mechanics, I abandoned all hope of being able to sneak through the entire prison in the prologue and decided that everyone who opposed me would die by my blade. Once I escaped from the prison, the person responsible for my freedom scowled at me, saying that I wasn't supposed to create a bloodbath. While I agree, I'm not willing to repeat this sequence however many times I must to not kill anybody unless the rewards are worth it. What benefits do I get for sneaking out of jail?

Solution 1:

The change made by sneaking out is not worth mentioning,as Fabian sad it is happy face instead the sarcastic one and some more exp points.

The thing i saw recently is that there is an alternate path that leads out of dungeon and it has a bit different story.Never tried it myself so maybe it is only beta or console version but check it out.