The Inertia is the first true distance driver in the MVP line. This disc is described as a “controllable distance driver” with GYRO Push that gives throwers increased control for distance drives. ... For less experienced players, the Inertia will provide a neutral flight with reliably straight distance.
Proton is a beautiful and durable blend in the MVP line. Like all MVP discs, Proton has two seperate plastics; a transparent flight plate in vivid colors, and a black solid outer rim.