MAC Nude Pink is a moderately warm-toned, medium peach with a semi-matte finish. It is a limited edition blush that retails for $35.50 and contains 0.35 oz.
MAC Nude Pink High-Light Powder ($32.00 for 0.35 oz.) is described as a "champagne base with silver." It's a light-medium peachy-beige witha very fine gold shimmer. The silver is merely an over-spray and disappears the first time the brush swishes across the surface (which I removed prior to swatching/using). bareMinerals The Premiere (LE, $26.00) is more shimmery, warmer. Chanel Caresse (180) (LE, $45.00) is less shimmery. Guerlain Perles d’Etoiles (LE, $60.00) is warmer. Surratt Beauty Duchesse (P, $32.00) is lighter. Marc Jacobs Beauty Shameless (220) (P, $30.00) is darker, more matte. MAC Amber Glow (LE, $27.00) is lighter, more shimmery. MAC Bareness (LE, $25.00) is more shimmery. Get comparison swatches / compare dupes side-by-side.
FURTHER READING: Formula Overview, which is a detailed review of the range as a whole.