Always prefer bi-wire if gauge and length are the same. With bi-wire all you are doing is doubling the amount of conductor resulting in way lower resistance for the low voltage DC current. Jumper with 12awg cables vs Bi-wired with half thickness cable will give you almost identical results.
Go for the most amount of copper and high quality plugs where the conductors are joined. Largest amount of contact surface will give least conductive resistance.
Go for the most amount of copper and high quality plugs where the conductors are joined. Largest amount of contact surface will give least conductive resistance.