Based on 7 and 1459 real audits
| Metric | D3 | Google Tag Manager | Winner |
|---|---|---|---|
| Performance | 53 | 39 | D3 |
| Accessibility | 79 | 89 | Google Tag Manager |
| Best Practices | 86 | 87 | Google Tag Manager |
| SEO | 90 | 91 | Google Tag Manager |
| Security | 69 | 64 | D3 |
| TTFB | 314ms | 330ms | D3 |
| Composite | 74 | 73 | D3 |
D3 outperforms Google Tag Manager in 4 of 7 categories, with a stronger composite score (74 vs 73). Google Tag Manager leads in accessibility, best practices, SEO.
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