Where The Ordinary Multi-Peptide + Hyaluronic Acid Serum for Firmness and Elasticity really shines is active ingredient strength, scoring 8.4 compared to innisfree Rapid Vitamin C Brightening Serum for Dark Spots + Post-Breakout Marks's 5.7. Its formula features Acetyl Hexapeptide-8, Pentapeptide-18, and Palmitoyl Tripeptide-1 in high positions, signalling meaningful concentrations.
The Ordinary Multi-Peptide + Hyaluronic Acid Serum for Firmness and Elasticity brings Acetyl Hexapeptide-8, Pentapeptide-18, and Palmitoyl Tripeptide-1 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. The Ordinary Multi-Peptide + Hyaluronic Acid Serum for Firmness and Elasticity gets the nod here with its 8.8 overall score — you're getting more for a similar outlay.