I have only heard people getting good results back stacking the two.
They feel quite different. Forged I didn't feel the thermo effect until I started doing cardio, adderllin I feel When I am just sitting on the couch, lol. But I have heard people say Totally different things about both.
You just have to try them to find out. They are different formulations So using both should be more effective however you dose it. These are powerful supps so take with caution.