Packaging and Figure Guide:

• The real Slag "TM" box does not have the black bar with the word Trans formers" however the KO's still have "R" on the box flap
• The dot next to Ages. should be a colon:
• In early batches of the counterfeit, all parts on Slag originally silver are gold, except for his mane. This includes his jaw, the chrome parts on his ribs, and his gun. Later versions are silver like a real Slag. Reportedly there is also a variant of the counterfeit with a red jaw.
• Some versions of the counterfeit include a silver chrome sword, other versions include a red sword like a real Slag would have.
• Early versions of the counterfeit have a plastic film over the first holes.
• Slag's dino face is completely translucent on the counterfeit, whereas the original is very slightly opaque.
• All dinobot KO's appear to use the "TM" moldings, stamped instructions, but with "R" copyright boxes. 
• Color variants: Normal, Clear, Pink, Blue Diaclone, Red Face

The below photos were saved from AC Toys before they stopped hosting them. (NB - The photos show a KO Slag with gold mouth, this was changed to silver/chrome).