There are quite a few differences.
Most existing PEMF units only apply a single pulse and their pulses are in the same direction. Big Magic reverses the signal every 10 minutes. After treatments, your body overall charge will be neutral, even though the mitochondria within your individual cells will gain energy.
Another difference is the waveform. The waveform produced by Big Magic is very sharp. Sharper than almost any other PEMF unit. This sharpness allows the signal to induce a stronger signal within cells.