D.W.
Neither!!!!!
Neither product is approved by the FDA meaning the companies really haven't done the research to prove the results nor do they have the FDA legally required to keep track of safety data regarding the products. Remember both Hydroxycut and Xenadrine were pulled off the market for severe side effects - neither were FDA approved (yes, the ingredients were registered with the FDA, but the clinical trials have never been done).
I asked an Endocrinologist (hormone specialist) I knew professionally about Relacor when it was really being heavily advertised a few years ago. He said there is NO merit to using a product that targets cortisol. He called them a waste of money with no medical proof of use.
Many products have come and gone trying to use hormones such as cortisol to treat weight - my previous company is currently deep in clinical research (programs at least a decade old) to bring Rx products that are based upon ghrelin, leptin, amylin - all naturally-occuring hormones associated with weight regulation. It will be years before they're available if FDA approved.
My best advice is always to consult with your physician and a dietician before moving to a change in your diet to instill weight loss.
Most people diet which drastically reduces your caloric intake, adjusts your body's metabolic needs, and when you're done dieting, you'll gain all the weight you loss plus extra.
Most experts agree that you need to change the relationship with food - slow down when eating, chew thoroughly, drink water with your meals, add fiber, etc. A good dietician will help you work through your likes/dislikes to come-up with a good meal plan.
Weight Watchers is always highly praised by Registered Dieticians as a balanced approach to managing and losing weight. My husband is doing it online and has found it to be relatively easy without feeling like he's missing anything.
Good luck. Please be careful.
You may want to check with your physician to see if an Rx product (which has much more safety monitoring) is less expensive than going OTC.