In usual opinion of consumers , all hand foaming soap could produce rich foam, but actually not.

With normal foam soap,the foam looks rich and delicate, but with alcohol content more than 50% foam soap, the foam become thin

use normal foam soap or alcohol content less than 50% foam soap, the dispensed foam will be more delicate.
Used alcohol foam soap, if the alcohol content exceeds 50%, the dispensed foam will be rough.