Pedantic cloud enjoyer here, the article should name this a pyrocumulus not pyrocumulonimbus - the nimbus part means 'rain-bearing' in meteorology, fire clouds don't rain.
I'm something of a cloud-enjoyer. If you're interested in learning more about clouds I'd recommend the international cloud atlas website.
https://cloudatlas.wmo.int/en/home.html
If you were writing a promotional post for your new model, would you include benchmarks of a competitor that's spanking you across the board? This is marketing.
Kiri engine is pretty easy to use and just released a good update for their 3DGS pipeline, and they have one of the better 3DGS to mesh options.
https://kiri-innovation.github.io/3DGStoMesh2/