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Pick 2–4 products of the same type. The verdict is built from their actual numbers, not written in advance — and the link carries your picks.
Comparing 2 of 4
Acer Aspire 15 · 549 €Lenovo IdeaPad Slim 3i 15 · 449 €
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The value of a comparison is the differences.
| What matters | Acer Aspire 15AcerMedium confidence | Lenovo IdeaPad Slim 3i 15LenovoMedium confidence |
|---|---|---|
| Worth Score | 6.4 (best in this comparison) | 6.2 |
| Best price | 549,00 € | 449,00 € (best in this comparison) |
| Confidence | Medium | Medium |
| Price fairness | 8.4 | 8.6 (best in this comparison) |
| Build quality | 5.6 (best in this comparison) | 5.0 |
| Performance | 6.2 (best in this comparison) | 5.6 |
| Longevity | 5.8 (best in this comparison) | 5.4 |
| Repairability | 7.0 (best in this comparison) | 6.8 |
| Support & warranty | 5.2 | 6.0 (best in this comparison) |
| CPU | Intel Core 5 120U | Intel Core i5-1235U |
| RAM | 16 GB DDR5, two slots | 8 GB DDR4, one slot free |
| Storage | 512 GB NVMe, replaceable | 512 GB NVMe, replaceable |
| Screen | 15.6" 1920×1080 IPS, 60 Hz, 300 nits | 15.6" 1920×1080 TN, 60 Hz, 250 nits |
| Battery | 5 h mixed use | 7 h mixed use |
| Upgradeable | RAM, SSD and battery | RAM and SSD |
| Best for | Office work on a budget · Upgrading the RAM yourself · A big screen for the money | Documents, browsing and video calls · A spare machine · Adding your own RAM and SSD later |
| Avoid if | You carry it every day · You need the battery to last a flight | You want it to feel nice · You do anything sustained |
| Main drawback | Under 5 hours of real battery life | Plastic chassis flexes under the palm rest |
Verdict
Take the Lenovo IdeaPad Slim 3i 15 unless you need performance.
The Acer Aspire 15 scores highest at 6.4, but it costs 100,00 € more than the Lenovo IdeaPad Slim 3i 15, which scores 6.2. That premium buys you performance — 0.6 points of it. Worth it if office work on a budget describes you; otherwise it is money you keep. Watch out for plastic chassis flexes under the palm rest on the Lenovo IdeaPad Slim 3i 15.
Best overallAcer Aspire 15 — Highest Worth Score here at 6.4, 0.2 ahead of the Lenovo IdeaPad Slim 3i 15. Best for office work on a budget.
Best valueLenovo IdeaPad Slim 3i 15 — 100,00 € cheaper than the Acer Aspire 15 and only 0.2 behind on Worth Score. You give up performance.
Prototype data — prices and retailer stock are a fixed demo snapshot from 28 July 2026, not a live feed.