These two serums take different paths to a similar destination. Both formulas include solid hydrating ingredients, and the overall scores reflect that — the gap here is genuinely slim.
Murad Mini Vitamin C Glycolic Brightening Serum brings Glycolic Acid, Ascorbic Acid, and Inositol as actives, while innisfree Rapid Vitamin C Brightening Serum for Dark Spots + Post-Breakout Marks relies on Lactobacillus Ferment Lysate, Gluconolactone, and Niacinamide. Both approaches have merit, but the positioning and supporting ingredients make the difference.
Both sit in the mid-range bracket, so value comes down to formulation quality. Murad Mini Vitamin C Glycolic Brightening Serum gets the nod here with its 8.6 overall score — you're getting more for a similar outlay.