The NRG GT4 Core coils are available in 0.15 Ohm resistance and are intended to be used in conjunction with the NRG Mini tank and Vaporesso Revenger kit.
The GT4 twin coils are designed to produce more flavour at lower wattages. The GT4 coils' use of a Clapton wire guarantees that you will taste the most flavour.
The eight-coil architecture of the GT8 Octo coils allows for increased power and vapour production. The GT8 coils' use of a Clapton wire guarantees that you will taste the most flavour.