The Anvil does that “first use” impressive big clouds because it was engineered to do that with no effort from the user.
You can reach almost identical results (almost because the dani adds a bit of conduction that the anvil is missing) with experience.
Again I need to say that they feels and are 2 different categories and that the imho actual Dani’s competitor is the dynavap fmj.
The anvil’s vapor is thicker but doesn’t feel more dense when vaping it compared to the Dani. Using it as a one hitter you can achieve very similar results (with the Anvil able to do a step further in the RTL without user effort). Instead, the Anvil ability to cool down is better than Dani SS stem or Glass stem (i do not have a wood stem).
As said they are very close with minor differences, while the anvil feels more engineered (like a tesla) the Dani feels more “mondane” and robust (like a muscle car).
Those are my thought on top of my head, if you have any question ask, I’m willing to answer.
For me, the Anvil is more statisfactory. I fell more medicated after it.
Here’s a video about a direct comparison.
(Due to different airflow, the anvil is vaporised first, than the Dani. I reheat the dani becuase it cooled down while vaping the anvil)
(Dani is left side)