Gold Monster 1K coils

[Dieseltechjon]

Does anybody know the main difference in the coils on this GM1k? Bigger coil will go deeper, and the smaller coil is more sensitive? I thought because the frequency never changes its not going to go any deeper, but I'm by far no expert.

 

[leadnugget]

here is a good video that tests the 2 coils.
interesting charts at the end.

 

[Dieseltechjon]

Thanks for sharing. It looks awfully close. I was hoping someone with some experience using both would chime in.