MAC Antique Diamond is a slightly warm-toned, dark pewter with a frost finish. It is a discontinued eyeshadow that retails for $23.00 and contains 0.17 oz.
MAC Antique Diamond Pro Longwear Paint Pot ($18.50 for 0.17 oz.) is described as a "frosted olive silver." It's an olive green-tinged brown with a general mutedness and a sprinkling of silver sparkle. MAC Enviable is darker and a powder product. Dior Khaki Design #3 is greener, less metallic, and a powder product. MAC Cakeshop is greener. Benefit Skinny Jeans is similar--it has a more satiny finish than a metallic one (and for the record, Birthday Suit is less green-tinged).
FURTHER READING: Formula Overview, which is a detailed review of the range as a whole.
A highly pigmented, long-wearing, blendable eye primer and/or cream shadow – M·A·C Pro Longwear Paint Pot goes on creamy and dries to an intense, vibrant finish that lasts for 24 hours. The innovative second skin-like creamy shadow formula blends smoothly over lids and creates seamless, buildable coverage without looking heavy or cakey. Its superior colour purity stays true and will not streak or crease. Pro Longwear Paint Pot can be mixed with other products, like M·A·C shadows and liners.