All of our BMUs share the same fundamental core principles. The Special Edition versions take the performance of these fundamentals to another level. We use Mundorf Silver capacitors and resistors. Vishay Schottky diodes and higher performance relays alongside a brand new custom wiring loom from Neotech. You can visually determine the difference between the standard and Special Edition by the front badge and from the rear, with the higher conductivity ground connector from Viborg.