Most of the soaps I use these days, except for SV, are Italian style croaps, some softer than others. I start with the same amount of water in a badger brush and just vary pressure and load time, and monitor the lather produced during the loading process. I add water, if needed, while building the lather on my face. Also, these days I only face lather.
Easiest for me in order are:
Long Rifle Soap Company
Cella
Sterling
SV
Easiest for me in order are:
Long Rifle Soap Company
Cella
Sterling
SV