The Snow White tin is slightly larger and is surrounded by the seven smaller dwarf tins. This is symbolic of the Chinese idiom "七星伴月" which means the moon (月) is accompanied by seven (七) stars (星).
The set of eight was sold at Hong Kong Disneyland as well as in other stores in Hong Kong. The Snow tin measures approximately 4" diameter x 2" high (10 x 5 cm). The dwarfs are 3.5" x 1.75" (9 x 4.5 cm).
The side panel design on the Snow White tin differs from that on the Seven Dwarfs'.
Images from the Filmic Light Collection.
I bought this set in April 2014 from an ebayer in Hong Kong. He couldn't recall what year he'd purchased them new, but Hong Kong Disneyland did not open until September 2005. So they probably date from about this time period.