Lenovo - ThinkVision P27u-20 vs Samsung - ViewFinity S9 (S90PC)
Where they actually differ
The most decisive specs, ranked by how much they matter — before the full spec table.
| Spec | Lenovo - ThinkVision P27u-20 | Samsung - ViewFinity S9 (S90PC) |
|---|---|---|
| Peak brightness | 400 nits | 600 nits |
| Response time (GtG) | 6 ms | 5 ms |
| USB-C Power Delivery | 100 W | 90 W |
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 / response time (gtg). Overall, the ThinkVision P27u-20 scores 62.6 and the ViewFinity S9 (S90PC) scores 65.9 on our Mars Score.
Which should you buy?
The ViewFinity S9 (S90PC) edges ahead on the Mars Score (62.6 vs 65.9), but the 3.3-point gap is small enough that the right pick comes down to which spec advantages matter to you.
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. The single most decisive one: USB-C Power Delivery — 11.11% more. 100 W vs 90 W.
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). The single most decisive one: Peak brightness — 50.00% more. 600 nits vs 400 nits.
Both ship with comparable refresh rate, dci-p3 coverage, screen size, 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: Lenovo - ThinkVision P27u-20 or Samsung - ViewFinity S9 (S90PC)?
Samsung - ViewFinity S9 (S90PC) leads the current Mars Score by 3.3 points.The more useful decision is the trade-off behind that result: compare the highlighted specifications against the way you will actually use the product.
Choose Lenovo - ThinkVision P27u-20 if…
Lenovo - ThinkVision P27u-20 has the measurable edge on has usb c pd w.
Choose Samsung - ViewFinity S9 (S90PC) if…
Samsung - ViewFinity S9 (S90PC) has the measurable edge on peak brightness nits, response time ms.
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 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).