I would think the twisted 28awg would give better flavor in a dual coil config 3.5mm with an 9half/8full wrap at about 60watts (cooler vape with better flavor lowest heat flux of 133 mW/mm²) to about 90watts (hotter vape with more vapor production heat flux of 200 mW/mm²). Twisted having grooves and valleys will vaporize more liquid than just normal straight wire, and needs be calculated as a quad coil due to 4 wires in parallel only twisted. If that is to warm for you even still, check out
http://www.steam-engine.org/coil.asp is an excellent coil wrapping simulator. Also, flavor is also affected by airflow and chamber size of your atomizer, a bit tighter airflow in a narrow reduced chamber will give a warm, but very flavor saturated vape, where a wider larger chamber with very loose airflow will produce a larger vapor cloud but flavor is sacrificed due to the amount of air to flavored vapor ratio is lower and can potentially give a cooler vape.