| Metric | Bootstrap | MailChimp | Winner |
|---|---|---|---|
| Performance | 47 | 48 | MailChimp |
| Accessibility | 88 | 82 | Bootstrap |
| Best Practices | 91 | 94 | MailChimp |
| SEO | 92 | 92 | Tie |
| Security | 62 | 65 | MailChimp |
| TTFB | 298ms | 373ms | Bootstrap |
| Composite | 74 | 76 | MailChimp |
MailChimp outperforms Bootstrap in 4 of 7 categories, with a stronger composite score (76 vs 74). Bootstrap leads in accessibility, TTFB.
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