For some products, the only difference is the label, which I've noted with an asterisk:
A. The product is being marketed by an established manufacturer that has had a long term success record. B. It's a product being marketed by a company that is new to this line of products, or hasn't been in business long enough to know if it can handle the demands of selling products to quit smoking. C. It's a new product, not used for any other purpose. D. It is a new product, and has not been tried or used in any other context in the past and will probably never be. E. It has an unknown quantity of people who are seeking assistance in quitting who don't know where to begin. It has a price tag that is higher than a product that has been used for many years and has proven that it does help people. The brand is not known to be effective. F. If you want to quit smoking completely, you are better off with a nicotine patch or gum. The benefits of the patch/gum are not enough to overcome the potential risk. The main point that I would like to make is that I don't know what will help people quit smoking, but I know there are people who are looking for help.