Samsung - Galaxy Book4 Ultra vs Lenovo - Yoga Slim 9i (Aura Edition)
Where they actually differ
The most decisive specs, ranked by how much they matter — before the full spec table.
| Spec | Samsung - Galaxy Book4 Ultra | Lenovo - Yoga Slim 9i (Aura Edition) |
|---|---|---|
| CPU cores | 16 | 8 |
| Claimed battery life | 11 h | 18 h |
| Screen size | 16 " | 14 " |
| Battery | 76 Wh | 75 Wh |
| Weight | 1.86 kg | 1.35 kg |
Between the Galaxy Book4 Ultra and Yoga Slim 9i (Aura Edition), the Galaxy Book4 Ultra comes out ahead in cpu cores / screen size, while the Yoga Slim 9i (Aura Edition) wins on claimed battery life / weight. Overall, the Galaxy Book4 Ultra scores 70.3 and the Yoga Slim 9i (Aura Edition) scores 69 on our Mars Score.
Which should you buy?
These two are nearly even on the Mars Score (70.3 vs 69). The decision is not about overall quality — both clear the bar — it is about which specific trade-offs fit your use.
Pick the Galaxy Book4 Ultra if your top frustration with your current device is running out of charge before the day ends — endurance is the lead spec here. The biggest gaps in its favor are cpu cores, screen size, battery. The single most decisive one: CPU cores — 100.00% more. 16 vs 8.
Pick the Yoga Slim 9i (Aura Edition) if you care most about claimed battery life / weight. Its strongest claims are claimed battery life, weight. The single most decisive one: Claimed battery life — 63.64% more. 18 h vs 11 h.
Both ship with comparable ram, storage, refresh rate, so those specs do not separate the two — focus on the differences below.
Bottom line: there is no wrong answer here — match the spec advantages to how you actually use the product. The Mars Score parity says both are well-rounded; the differences are about trade-offs, not quality.
Which should you buy: Samsung - Galaxy Book4 Ultra or Lenovo - Yoga Slim 9i (Aura Edition)?
Samsung - Galaxy Book4 Ultra leads the current Mars Score by 1.3 points.The more useful decision is the trade-off behind that result: compare screen size, weight, battery against the way you will actually use the product.
Choose Samsung - Galaxy Book4 Ultra if…
Samsung - Galaxy Book4 Ultra has the measurable edge on cpu cores, screen size in, battery wh.
Choose Lenovo - Yoga Slim 9i (Aura Edition) if…
Lenovo - Yoga Slim 9i (Aura Edition) has the measurable edge on claimed battery h, weight kg.
This is a structured comparison of the published catalog values. It is not a claim of identical real-world performance across every workload; use the linked spec drill-downs and methodology page to inspect the inputs.
Why Samsung - Galaxy Book4 Ultra wins
- ▲CPU cores — 100.00% more. 16 vs 8.
- ▲Screen size — 14.29% more. 16 " vs 14 ".
- ▲Battery — 1.33% more. 76 Wh vs 75 Wh.
Why Lenovo - Yoga Slim 9i (Aura Edition) wins
- ▲Claimed battery life — 63.64% more. 18 h vs 11 h.
- ▲Weight — 0.51 kg less. 1.35 vs 1.86.
Spec comparison
Design
| Spec | Samsung - Galaxy Book4 Ultra | Lenovo - Yoga Slim 9i (Aura Edition) |
|---|---|---|
| Weight | 1.86 kg | 1.35 kglead |
| Thickness | 16.5 mm | 12.9 mmlead |
| Build material | aluminum | aluminum |
| Backlit keyboard | true | true |
| Fingerprint reader | true | true |
Display
| Spec | Samsung - Galaxy Book4 Ultra | Lenovo - Yoga Slim 9i (Aura Edition) |
|---|---|---|
| Screen size | 16 "lead | 14 " |
| Refresh rateⓘ | 120 Hz | 120 Hz |
| Panel typeⓘ | OLED | OLED |
Performance
| Spec | Samsung - Galaxy Book4 Ultra | Lenovo - Yoga Slim 9i (Aura Edition) |
|---|---|---|
| CPU | Intel Core Ultra 9 185H | Intel Core Ultra 7 258V |
| CPU cores | 16lead | 8 |
| GPUⓘ | NVIDIA RTX 4070 Laptop | Intel Arc 140V |
| RAMⓘ | 32 GB | 32 GB |
| Storageⓘ | 1024 GB | 1024 GB |
| Storage typeⓘ | SSD | SSD |
Battery & Ports
| Spec | Samsung - Galaxy Book4 Ultra | Lenovo - Yoga Slim 9i (Aura Edition) |
|---|---|---|
| Batteryⓘ | 76 Whlead | 75 Wh |
| Claimed battery life | 11 h | 18 hlead |
| USB-C portsⓘ | 1 | 2lead |
| Thunderbolt portsⓘ | 2 | 2 |
| HDMI | truelead | false |
Frequently asked
Which has better battery life, Galaxy Book4 Ultra or Yoga Slim 9i (Aura Edition)?+
Yoga Slim 9i (Aura Edition) claims up to 18 hours — 11h vs 18h.
Which is lighter, Galaxy Book4 Ultra or Yoga Slim 9i (Aura Edition)?+
Yoga Slim 9i (Aura Edition) is lighter at 1.35 kg vs 1.86 kg.
Which has an OLED display, Galaxy Book4 Ultra or Yoga Slim 9i (Aura Edition)?+
Both have OLED displays.