Where The Ordinary Power of Peptides Set really shines is active ingredient strength, scoring 9.8 compared to Paula's Choice Mini Must-Haves with 2% BHA Exfoliating Toner, Foaming Cleanser, & SPF 50's 6.8. Its formula features Acetyl Hexapeptide-8, Pentapeptide-18, and Palmitoyl Tripeptide-1 in high positions, signalling meaningful concentrations.
The Ordinary Power of Peptides Set brings Acetyl Hexapeptide-8, Pentapeptide-18, and Palmitoyl Tripeptide-1 as actives, while paula's Choice Mini Must-Haves with 2% BHA Exfoliating Toner, Foaming Cleanser, & SPF 50 relies on Ceramide Np, Ceramide Ap, and Ceramide Eop. 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 Power of Peptides Set gets the nod here with its 9.4 overall score — you're getting more for a similar outlay.