I have been using both the king and falcon 2 ahead of review.
at a push the flacon 2 aims to give a thicker flavour than the previous type. So you get more vapour produced mixed with flavour throughout. Comparing the two, the king is more airy and to some extent stronger base flavour. Whereas the flacon 2 delivers the flavour throughout the vapoe, and is push in coils.
Which one is better?
Depends on your vaping style. The thicker flavour technically is much better on the falcon 2 but the king is still a top vape