http://rpgvault.ign.com/articles/930/930117p2.html
The top of the second page, and
http://pc.ign.com/articles/925/925916p2.html
The bottom of the second page.
Apparently, the choices won't make the game easier/harder, just ..different. You blackmail an informant, and he/she gives you valuable info, but will try to kill you later, stuff like that.
At least, that's the impression I got.