Actually, the Globus programs, during the off interval have a pulsating twitch at 3 Hz (not sure if the Compex has it), which increases blood flow and allows muscles to replenish their energy stores faster. This in turn postpones fatigue. I suspect it allows to shorten Charlie’s suggested 5x rest interval.
Charlie’s Globus Premium Sport has also an additional program identical to his protocol 10 sec on, 10 sec off x 10. His machine (code named SportCoach) has the capability to tweak all parameters. It would be possible to experiment and find a shortened optimum, given the improved off period at 3 Hz.