i think if you get a phunnel going properly it can out perform the vortex.
i have 3 phunnels. A mini, a small, and a medium. The large is useless as it lasts 8 hours or more.
my medium lasts 4 hours
small lasts 2
mini lasts 1, but since its shallow i can easily underpack it and get it to go just 30 minutes
Hookah Pro Legitimate hookah without the bias.