According to the sources provided, Lipitor (atorvastatin) is generally cheaper than Crestor (rosuvastatin). Lipitor went off-patent in 2011, which means that generic versions of the drug are available at a lower cost [1]. In contrast, Crestor's patent expired in 2016, but the generic version of the drug, rosuvastatin, is still relatively expensive [2].

GoodRx, a website that compares prescription drug prices, reports that the average retail price of Lipitor is $10.20 for a 30-day supply, while the average retail price of Crestor is $274.50 for the same amount [2]. However, these prices can vary depending on the pharmacy and location.

When comparing the effectiveness of the two drugs, both Lipitor and Crestor are in the statin drug class and are used to lower cholesterol levels in the blood. However, Crestor is generally considered to be more potent than Lipitor and may be more effective in reducing LDL cholesterol levels [3].

In summary, Lipitor is generally cheaper than Crestor due to the availability of generic versions of the drug. However, the effectiveness of the two drugs may differ, with Crestor being considered more potent. It is important to consult with a healthcare provider to determine which medication is best for an individual's specific needs and medical history.

Sources:
[1] https://www.drugpatentwatch.com/p/tradename/LIPITOR
[2] https://www.goodrx.com/classes/statins
[3] https://www.drugs.com/compare/crestor-vs-lipitor