I have not used any other brand of atd product other thatn t-drive. I will say that my scrotal size is at a level beyond what I ever remembered. However, I do feel less of a sex drive, and my seminal volume is WAY UP! All a cycle gains seems to be holding up nicely and strength seems to be holding/slightly increasing still. No expert at all but I'd say it's real likely it's the same thing as rebound or ultra hotter.