The hot swappable PCB supports only WKL layout with 7u spacebar.
The solder PCB supports WK/WKL, split BS, split left/right shift, ISO, ALPS.
This is the setup I use on almost all 80% keyboard designs, and I believe it's the best and the most correct settings.
The plate supports both WK and WKL. It doesn't support ISO and ALPS tho.
I also believe it's the best setting in general for a GB.
(Edit: The hot swappable PCB doesn't support 6.25u spacebar. It supports [1.5u 1u 1.5u 7u 1.5u 1u 1.5u] bottom row, which means it does support 1u Win keys.)