The concept of Benz having the resistors on the end of solid core wires is that all wires, regardless of length,
are electricaly uniform. The resistance on the other end is built into the rotor and is , again, common to all plugs.
Whereas, Resistance wire ohmage is measured, and increases, with length.
So one plug, being fed from the same coil, can have a much higher resistance circuit than another with a shorter wire.
The solid core wires also last much longer.
Another reason not to use resistor plugs.