gtimax, after owning both, I would say the Mamba Max is just as good or better than the GTB. The main advantage the GTB may have over the Mamba would be that the case is water resistant & it's ROAR legal. Otherwise, you definitely get more for your money from the Mamba. Some may have pointed this out before, but Castle Creations has an awesome customer support which I have yet to see any other company rival. They are constantly looking for ways to improve their products through the software and the updates are available free for download.