You only need 3 caps of reduce xt. 1 cap upon waking, 1 cap four hours later, and 1 cap before bed. That being said, a lot of people take 3-6 caps daily. Keep in mind if the dose is too high you will experience joint discomfort. If that occurs, just drop back the dosage. However, I would suggest sticking with the suggested dosage (3 caps daily) for 2 weeks and then from here bumping it up if you're not satisfied with the results.
There is only one version of Reduce XT (look at the ingredient panel). If you're talking about the bottle/label difference, from the owner: