That whole "threads don't need good conductivity" mindset is still thinking about voltage drop, instead of measurement accuracy. The whole wiring loop on a TC mod is important, not just the one-way flow of electrons from the 510 positive pin to a coil that mech users fuss about.
Think of the positive and ground paths on a TC mod as data lines, where you want the cleanest signal possible, rather than just a pipeline that throws power at a coil, and you might begin to understand why high conductivity/low resistance can be important. Dirty signal, dirty results, garbage in, garbage out.
And thats what Ill try to proof.. which seems to be true. VT40 vs HB40 act absolutly diffrent in TC Mode (v5 vs v1 AND Brass vs SS). To be more accurate i wanna wait for DNA200 (VT200 vs BOXER = Brass vs SS WITH same software).