40 kHz max on the Nox800 vs. Makro Kruzer 61 kHz - what's better for tiny gold in mineralized soil?

[teacup]

40 kHz max on the Nox800 vs. Makro Kruzer 61 kHz - what's better for tiny gold in mineralized soil? is the 40 kHz max a limitation compared to being able to go higher to 61 kHz ?

 

[XLOOX]

In more mineralised soils I prefer GKruzer as it runs much quieter, but in lower mineralization, like creek beds, the 800 will see small gold a bit deeper.

Both are good machines.