Head to head
Acer Aspire 15 vs Lenovo IdeaPad Slim 3i 15
Both scored on the same six factors, priced on what you actually pay including delivery, and each claim linked to the source it came from. Prototype data — prices and retailer stock are a fixed demo snapshot from 28 July 2026, not a live feed.
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.
Side by side
Add a third product →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) |
| 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 |
| 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 |
2 identical rows hidden. They are the same for every product here, so they cannot help you choose.
What each score is based on
2 published sources between themAcer Aspire 15
Lenovo IdeaPad Slim 3i 15
Confidence is computed from those lists, not asserted: Acer Aspire 15 is medium on 1, Lenovo IdeaPad Slim 3i 15 is medium on 1. A factor with nothing behind it says so on the product page rather than borrowing a citation that does not speak to it.
Also compare
All laptops we cover →Framework Laptop 13 vs Apple MacBook Air 13" M3Framework Laptop 13 vs Lenovo ThinkPad X1 Carbon Gen 12Dell XPS 13 (9340) vs Framework Laptop 13Framework Laptop 13 vs Apple MacBook Air 13" M1Framework Laptop 13 vs HP Pavilion Aero 13ASUS Zenbook 14 OLED vs Framework Laptop 13Framework Laptop 13 vs Lenovo Yoga 7 2-in-1 14Framework Laptop 13 vs Lenovo Legion Pro 5 16Apple MacBook Air 13" M3 vs Lenovo ThinkPad X1 Carbon Gen 12Dell XPS 13 (9340) vs Apple MacBook Air 13" M3ASUS Zenbook 14 OLED vs Apple MacBook Air 13" M3Lenovo Yoga 7 2-in-1 14 vs Apple MacBook Air 13" M3Lenovo Legion Pro 5 16 vs Apple MacBook Air 13" M3Framework Laptop 16 vs Apple MacBook Air 13" M3ASUS ROG Zephyrus G14 vs Apple MacBook Air 13" M3Apple MacBook Air 13" M3 vs Apple MacBook Pro 14" M4Dell XPS 13 (9340) vs Lenovo ThinkPad X1 Carbon Gen 12ASUS Zenbook 14 OLED vs Lenovo ThinkPad X1 Carbon Gen 12Lenovo Yoga 7 2-in-1 14 vs Lenovo ThinkPad X1 Carbon Gen 12Lenovo Legion Pro 5 16 vs Lenovo ThinkPad X1 Carbon Gen 12Framework Laptop 16 vs Lenovo ThinkPad X1 Carbon Gen 12ASUS ROG Zephyrus G14 vs Lenovo ThinkPad X1 Carbon Gen 12Apple MacBook Pro 14" M4 vs Lenovo ThinkPad X1 Carbon Gen 12ASUS Zenbook 14 OLED vs Dell XPS 13 (9340)Dell XPS 13 (9340) vs Lenovo Yoga 7 2-in-1 14Dell XPS 13 (9340) vs Lenovo Legion Pro 5 16Dell XPS 13 (9340) vs Framework Laptop 16ASUS ROG Zephyrus G14 vs Dell XPS 13 (9340)Dell XPS 13 (9340) vs Apple MacBook Pro 14" M4Acer Chromebook Plus 515 vs Lenovo IdeaPad Slim 3i 15Acer Aspire 15 vs Acer Chromebook Plus 515Lenovo IdeaPad Slim 3i 15 vs Apple MacBook Air 13" M1HP Pavilion Aero 13 vs Lenovo IdeaPad Slim 3i 15Acer Aspire 15 vs Apple MacBook Air 13" M1Acer Aspire 15 vs HP Pavilion Aero 13Acer Aspire 15 vs ASUS Zenbook 14 OLEDAcer Aspire 15 vs Lenovo Yoga 7 2-in-1 14HP Pavilion Aero 13 vs Apple MacBook Air 13" M1ASUS Zenbook 14 OLED vs Apple MacBook Air 13" M1Lenovo Yoga 7 2-in-1 14 vs Apple MacBook Air 13" M1ASUS Zenbook 14 OLED vs HP Pavilion Aero 13HP Pavilion Aero 13 vs Lenovo Yoga 7 2-in-1 14ASUS Zenbook 14 OLED vs Lenovo Yoga 7 2-in-1 14Lenovo Legion Pro 5 16 vs Lenovo Yoga 7 2-in-1 14Framework Laptop 16 vs Lenovo Legion Pro 5 16ASUS ROG Zephyrus G14 vs Lenovo Legion Pro 5 16Lenovo Legion Pro 5 16 vs Apple MacBook Pro 14" M4ASUS ROG Zephyrus G14 vs Framework Laptop 16Framework Laptop 16 vs Apple MacBook Pro 14" M4ASUS ROG Zephyrus G14 vs Apple MacBook Pro 14" M4
Prototype. Prototype data — prices and retailer stock are a fixed demo snapshot from 28 July 2026, not a live feed. Prices are the cheapest delivered price we recorded — 549,00 € and 449,00 € — not a live quote. How we score products.