Hi Jean,
Never really been fond of either of them. I Tried putting adsense on several websites we run and the pittance we got in return for the thousands of hits was just not worth the effort.
Also, tried adwords and found we'd be running at a loss very soon if we continued at the rate we were.
I hear of many success stories though, so it must work, just need to know the tricks I suppose, which I don't.
I even had a Google representative call me saying that my site, with its page rank (

and Alexa rank (7,000 at the time) , (yes he quoted Alexa rank <*shock*>) could generate over $2000 per month. Great I thought, so I put adsense on my site. Total was more like $50 for the month. The degradation of the site because of the ads just wasn't worth $40 so it was hastily removed.