Just got Argon One. It's really beautifull case but can't cool RPI4B @2ghz for 20mins on full load. Cheapest Chinese case with heatsinks and fan all for 4USD have much better performance.
There's some other comparison over here: https://github.com/nschloe/stressberry
but be warned, it doesn't record ambient temperatures, which adds an offset. Hard to compare exactly.
And if you are after some extreme cooling, see this
Just FYI, I have my RPI4 4GB (or a second one with 8GB) OC'ed to 2100MHz, over_voltage=6, core at 550MHz. Typical temperature deltas:
Idle - 10°C
Firefox running - 14°C
Max load (stress-ng or linpack) - 22°C
All passive, not with that 60mm Noctua fan. It slashes it even more.