"Wilson White " was the term given to the dominant white mutation when it occured,very similiar to the Tower beige,Gunning Black velvet, Afro violet.
Any and all dominant whites are wilson whites or Wilson white hybrids.
The other terms,mosaic, reverse mosaic ,silver, are all phenotype discritions of whites very similiar to the way color phases are used to describe other chins, A medium standard ,and a extra dark standard are still standards. Just a a prediminantely white ,and mosaic are still whites. It just is a discription of there appearance.
the term "mosaic" is every bit if not more so correct then the term "piebald" when refering to patterns on whites. The term "piebald" is not accurate genetic term when refering to patterns on Doiminant whites, regardless of claims a particular group.