I had a site with pagerank 4. And good traffic. For more Earnings in 3 months which is correct for my site. Which earns more in 90 days can you say
You can earn a good amount of money with ADSense if you're in a profitable niche like forex, insurance, etc. If you don't...I think clickbank with a good product related to your website will convert well.
They are really completely different. With Clickbank you really need to promote a product. Reviews, information, etc. Adsense is more about having general information related to that content. If you're in a niche with high paying keywords, Adsense can earn you a lot of money. If you're in a niche with a lot of available information products, Clickbank can earn you a lot of money. If you're in a niche with both, then both can!
I get 10,000 hits to my site per month. Adsense never made me more than 30 cents a day. Plus, it's ugly. There are a few people who've made a full time income with adsense, but I personally like Clickbank because you have more control over what people are purchasing.
Adsense is a joke. I make more money per unique visitor than I do per click at adsense. Screw that noise.