MAC Peach is a very warm-toned, light-medium peach with a metallic finish. It is a limited edition blush that retails for $39.00 and contains 0.35 oz.
MAC Peach Robert Lee Morris Powder Blush ($39.00 for 0.35 oz.) is a medium gold with warm, orange undertones and a frosted sheen. The consistency was soft, smooth, and velvety with just a touch of powderiness in the pan. It had good pigmentation that was buildable to full coverage with just half of a layer more. It applied evenly to my skin, blended out beautifully, and did not emphasize my skin's natural texture. This shade wore well for eight hours on me.
P.S. -- These blushes are substantially large than MAC's regular blushes (0.21 oz.), so the price per ounce difference looks more like this: $109.53/oz. (regular) compared to $111.43/oz (this one). That being said, powder blushes take forever to use up so I don't think that more is necessarily more here for every person. The packaging is unique and more egg-shaped, but it may not be practical for everyone.