The only difference between the Teton and the Teton Tioga is the porting of the frame and reel spools. The spools are actually interchangable between the 2 reels. Less and plainer porting on the Tioga keeps the price down but otherwise the same reel more importantly the same exact drag system. Makes the Tioga weigh a bit more but thats a good thing for this bamboo rod user.
The Magnum by Teton is a true large arbor, wide spool reel. While the large arbor spools for the Teton and the Tiogas are not true large arbor, you gain weight and lose backing capacity.

Tom