| Metric | Mastercard | Shopify | Winner |
|---|---|---|---|
| Performance | 35 | 28 | Mastercard |
| Accessibility | 81 | 87 | Shopify |
| Best Practices | 96 | 81 | Mastercard |
| SEO | 92 | 92 | Tie |
| Security | 73 | 70 | Mastercard |
| TTFB | 131ms | 205ms | Mastercard |
| Composite | 72 | 72 | Tie |
Mastercard outperforms Shopify in 4 of 7 categories, with a stronger composite score (72 vs 72). Shopify leads in accessibility.
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