It's what happens when a snow carries the silver gene so usually most of the brown areas on their coat go silver or charcoal and their coat is a Snow/ice White colour rather than ivory. It's the same as a silver is a brown cat who has the silver gene and it's removed all the colour from the coat so they look silver, it's also why silvers often have brown tarnish appear later on. What the (i) inhibitor gene does is remove colour so silver isn't actually a colour is a lack of colour.
It's very hard to tell the difference as kittens besides the backs of their ears are silver rather than brown and they usually need to have one silver parent or a parent that carries for silver. Arya's dad is silver and her mum is a seal Lynx point, in her litter it's now looking like there where two silver snows, two Lynx snows and one brown. The breeder I got the from Junglefire specialises in silvers and has since 1999 but even she said you can't always tell a silver snow by 13 weeks some it comes in very late and she doesn't find out they are silver snow until they are in their new homes.
http://silverstormbengals.co.uk/bengal-type/ Explains the colours a bit better with photos
Arya last night you can see how she's changed since coming out of her fuzzies
Griffith has very apparent silver markings on his face
I didn't know about them until this year then I saw one and just fell in love with the colour they are like a very contrasty snow.