Duelund 16ga vs. 12ga

I've read some comparisons on-line, but am curious about others' experiences comparing these two gauges of Duelund hookup wire...

I currently have 16ga on a pair of Coincident PREs which require four separate runs of cable (to power the subwoofer and head units).  I'm trying to figure out if I should replace both sets of wires, or leave 16ga on either the head units or subs... or just stick with the 16ga on everything.  I have two goals, 1) to extract as much bass as possible out of my system, and 2) to get the most natural tones and textures.

Any input is appreciated.