I have one of each..one has flat facets on the top of the buttstock and along the side below the action, the edge has a round top of the buttstock and is rounded along the side below the action...
The red/gray stock is the Edge..note rounded areas..
The black/white stock is the early non Edge stock lots of flat facets..
Brunos sometimes refer to these stocks as the Edge I and Edge II...
Brunos has a rifle for sale in the Classifieds that has an Edge (I) stock painted blue..