kayfun clone here. I prefer the aqua. I have a 91 and an aqua and I like the aqua way better because it is newer a improved technology. It uses duel air channels. I have only tried a duel coil on the aqua but I want to try 4 coils soon. This is s4v from ecf. He is vaping MBV Blu Moo at 50 pg 50 vg.