Can't speak directly on the umbilical cord as I don’t have either but have spoken to Dan on upgrading my LS36.5 to the DM and he clearly says the WyWires is an upgrade. When I purchased my LS36.5 from Dan directly he did praise WyWires which Im glad he did. What I can say for WyWires is they sound natural, full, open and do not draw attention to themselves; you just forget they are there. My previous cables were all silver and they were great cables but after changing out to WyWires I discovered they drew too much attention to themselves and although they did everything well, they were missing body and space. My previous power cords were another brand but same thing when I went to WyWires. Alex of WyWires is more than willing to chat and will steer you straight... not full of BS and does not over-sale. He’ll probably take your stock cord in on trade as well... probably just giving it back to Dan.