- Is the Voltric 70 or 70 e-tune more head heavy or stiffer than the Voltric 7 - Is the Voltric 70 e-tune worth that much more than the regular Voltric 70 - What does the purple add-ons do compared to the orange ones on the Voltric 70 e-tune (All rackets in 4u) I would really appreciate any help on some questions I have about these rackets. I currently own a Voltric 7 and I would like to upgrade to one the others, but I am not sure which one.