Lenovo - ThinkVision P27u-20 vs Samsung - ViewFinity S9 (S90PC)
Between the ThinkVision P27u-20 and ViewFinity S9 (S90PC), the ThinkVision P27u-20 comes out ahead in usb-c power delivery, while the ViewFinity S9 (S90PC) wins on peak brightness and response time (gtg). Overall, the ThinkVision P27u-20 scores 58.3 and the ViewFinity S9 (S90PC) scores 59.3 on our Mars Score.
Which should you buy?
These two are nearly even on the Mars Score (58.3 vs 59.3). The decision isn't about overall quality — both clear the bar — it's about which specific trade-offs fit your use.
Pick the ThinkVision P27u-20 if you care most about usb-c power delivery. The biggest gaps in its favor are usb-c power delivery.
Pick the ViewFinity S9 (S90PC) if the display is what you stare at all day — refresh rate, brightness, or sharpness is where the difference will be most visible. Its strongest claims are peak brightness, response time (gtg).
Both ship with comparable refresh rate, dci-p3 coverage, screen size, 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 - ThinkVision P27u-20 wins
- ▲USB-C Power Delivery — 11.11% more. 100 W vs 90 W.
Why Samsung - ViewFinity S9 (S90PC) wins
- ▲Peak brightness — 50.00% more. 600 nits vs 400 nits.
- ▲Response time (GtG) — 16.67% less. 5 ms vs 6 ms.
Spec comparison
Panel
| Spec | Lenovo - ThinkVision P27u-20 | Samsung - ViewFinity S9 (S90PC) |
|---|---|---|
| Screen sizeⓘ | 27 " | 27 " |
| Panel typeⓘ | IPS | IPS |
| Resolutionⓘ | 4K | 5Klead |
| Aspect ratioⓘ | 16:9 | 16:9 |
| Curvedⓘ | false | false |
Performance
| Spec | Lenovo - ThinkVision P27u-20 | Samsung - ViewFinity S9 (S90PC) |
|---|---|---|
| Refresh rateⓘ | 60 Hz | 60 Hz |
| Response time (GtG)ⓘ | 6 ms | 5 mslead |
| Peak brightnessⓘ | 400 nits | 600 nitslead |
| DCI-P3 coverageⓘ | 99 % | 99 % |
| HDRⓘ | true | true |
| G-Syncⓘ | false | false |
| FreeSyncⓘ | false | false |
Connectivity
| Spec | Lenovo - ThinkVision P27u-20 | Samsung - ViewFinity S9 (S90PC) |
|---|---|---|
| HDMI ports | 1 | 1 |
| DisplayPort ports | 1lead | 0 |
| USB-C input | true | true |
| USB-C Power Deliveryⓘ | 100 Wlead | 90 W |
| KVM | truelead | false |
Frequently asked
Which has higher refresh rate, ThinkVision P27u-20 or ViewFinity S9 (S90PC)?+
ViewFinity S9 (S90PC) refreshes at 60Hz vs 60Hz.
Which has faster response time, ThinkVision P27u-20 or ViewFinity S9 (S90PC)?+
ViewFinity S9 (S90PC) responds in 5ms vs 6ms.
Does ThinkVision P27u-20 or ViewFinity S9 (S90PC) have USB-C with power delivery?+
Both offer USB-C PD — 100W on ThinkVision P27u-20, 90W on ViewFinity S9 (S90PC).
Spec-level deep dives
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