The main difference in an authentic Noguchi Table versus a replica is the glass. It's a plate glass which makes it completely clear, not green/blue or any other light variations. It's also engraved with Noguchi's signature and thicker than a replica would be at 3/4". If you're looking at the walnut base, a replica will likely just be stained and not really walnut wood. Plus, wouldn't you rather have the real thing?! - Caroline @ Smart Furniture