Between the Yoga 9i Gen 9 and Zenbook S 14 UX5406, the Yoga 9i Gen 9 comes out ahead in cpu cores and battery, while the Zenbook S 14 UX5406 wins on ram and claimed battery life. Overall, the Yoga 9i Gen 9 scores 65.9 and the Zenbook S 14 UX5406 scores 64.2 on our Mars Score.
Which should you buy?
These two are nearly even on the Mars Score (65.9 vs 64.2). The decision isn't about overall quality — both clear the bar — it's about which specific trade-offs fit your use.
Pick the Yoga 9i Gen 9 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, battery.
Pick the Zenbook S 14 UX5406 if your top frustration with your current device is running out of charge before the day ends — endurance is the lead spec here. Its strongest claims are ram, claimed battery life, weight.
Both ship with comparable storage, screen size, refresh rate, so those specs don't 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 tells you both are well-rounded; the differences are about trade-offs, not quality.
Why Lenovo - Yoga 9i Gen 9 wins
- ▲CPU cores — 100.00% more. 16 vs 8.
- ▲Battery — 4.17% more. 75 Wh vs 72 Wh.
Why ASUS - Zenbook S 14 UX5406 wins
- ▲RAM — 100.00% more. 32 GB vs 16 GB.
- ▲Claimed battery life — 6.67% more. 16 h vs 15 h.
- ▲Weight — 0.16 kg less. 1.20 vs 1.36.
Spec comparison
Design
| Spec | Lenovo - Yoga 9i Gen 9 | ASUS - Zenbook S 14 UX5406 |
|---|---|---|
| Weight | 1.36 kg | 1.20 kglead |
| Thickness | 16 mm | 11.9 mmlead |
| Build material | aluminum | ceraluminum |
| Backlit keyboard | true | true |
| Fingerprint reader | true | true |
Display
| Spec | Lenovo - Yoga 9i Gen 9 | ASUS - Zenbook S 14 UX5406 |
|---|---|---|
| Screen sizeⓘ | 14 " | 14 " |
| Refresh rateⓘ | 120 Hz | 120 Hz |
| Panel typeⓘ | OLED | OLED |
Performance
| Spec | Lenovo - Yoga 9i Gen 9 | ASUS - Zenbook S 14 UX5406 |
|---|---|---|
| CPU | Intel Core Ultra 7 155H | Intel Core Ultra 7 258V |
| CPU cores | 16lead | 8 |
| GPUⓘ | Intel Arc Graphics | Intel Arc 140V |
| RAMⓘ | 16 GB | 32 GBlead |
| Storageⓘ | 1024 GB | 1024 GB |
| Storage typeⓘ | SSD | SSD |
Battery & Ports
| Spec | Lenovo - Yoga 9i Gen 9 | ASUS - Zenbook S 14 UX5406 |
|---|---|---|
| Batteryⓘ | 75 Whlead | 72 Wh |
| Claimed battery life | 15 h | 16 hlead |
| USB-C ports | 2 | 2 |
| Thunderbolt portsⓘ | 2 | 2 |
| HDMI | false | truelead |
Frequently asked
Which has better battery life, Yoga 9i Gen 9 or Zenbook S 14 UX5406?+
Zenbook S 14 UX5406 claims up to 16 hours — 15h vs 16h.
Which is lighter, Yoga 9i Gen 9 or Zenbook S 14 UX5406?+
Zenbook S 14 UX5406 is lighter at 1.20 kg vs 1.36 kg.
Which has more RAM, Yoga 9i Gen 9 or Zenbook S 14 UX5406?+
Zenbook S 14 UX5406 offers 32GB of RAM.
Which has an OLED display, Yoga 9i Gen 9 or Zenbook S 14 UX5406?+
Both have OLED displays.
Spec-level deep dives
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