Yikes, not getting a phunnel to smoke... I don;t see that happening.
but i'm sure there is a reasonable explanation.
The only things that work better in Standard bowls are Nakhla and HH/HF tobacco. They are generally dryer, and the point of the phunnel is to catch the juices in the bottom. HH and HF and Nakhla does in fact last longer in a Super Chief or Phunnel then in a Standard bowl in my opinion.
I keep a Standard Mya around for Nakhla or HH, when i feel like it of course.