NewDamage is on the money.
The products are designed for different population groups.
The Maximum Strength HOT-ROX contains a ratio more conducive to preserving lean body mass, while also containing plenty of the A7-E, which will help decrease fat mass as well.
On the other hand, regular HOT-ROX contains a formula where the ratios are altered more to address appetite suppression as well as stimulating metabolism, while not focusing quite as much on lean body mass retention.
That is what I mean when I say that each has a specific ratio designed for a certain population. The "hard-core" people don't have issues with compliance to a diet, generally speaking, and thus don't need to address appetite as much. Along those same lines, they'll generally have much more lean body mass than the general population, hence the reason why there is more focus on retention of LBM.
Hope that helps clear things up!