Performance / Lighthouse comparison at the same Magento backend?

Same Magento 2.4.8 install, same product catalog, same hosting:

• Hyvä: Lighthouse Performance 95+ on every page out of box. ~70 KB JS bundle. LCP under 1s on mid-tier mobile. Predictable across PLPs, PDPs, cart, checkout. No tuning required.
• PWA Studio: Lighthouse 70 – 85 typical for production stores. Variable — depends entirely on bundle size, hydration strategy, image handling, route caching. Specialist tuning can push it higher (90+ achievable) but it costs 80 – 200 hours of perf engineering and it regresses every time someone adds a feature.

The "PWAs are faster" narrative was true vs Luma (where the bar was Lighthouse 30). It is not true vs Hyvä. Hyvä wins on perf in 9 out of 10 head-to-head benchmarks in 2026.