Where they actually differ
The most decisive specs, ranked by how much they matter — before the full spec table.
| Spec | ASUS - ROG Swift PG39WCDM | MSI - MPG 271QRX |
|---|---|---|
| Refresh rate | 240 Hz | 360 Hz |
| Screen size | 39 " | 27 " |
| Peak brightness | 1300 nits | 1000 nits |
| USB-C Power Delivery | 90 W | 98 W |
Between the ROG Swift PG39WCDM and MPG 271QRX, the ROG Swift PG39WCDM comes out ahead in screen size / peak brightness, while the MPG 271QRX wins on refresh rate / usb-c power delivery. Overall, the ROG Swift PG39WCDM scores 78.3 and the MPG 271QRX scores 76.9 on our Mars Score.
Which should you buy?
These two are nearly even on the Mars Score (78.3 vs 76.9). The decision is not about overall quality — both clear the bar — it is about which specific trade-offs fit your use.
Pick the ROG Swift PG39WCDM if the display is what you stare at all day — refresh rate, brightness, or sharpness is where the difference will be most visible. The biggest gaps in its favor are screen size, peak brightness. The single most decisive one: Screen size — 44.44% more. 39 " vs 27 ".
Pick the MPG 271QRX if you care most about refresh rate / usb-c power delivery. Its strongest claims are refresh rate, usb-c power delivery. The single most decisive one: Refresh rate — 50.00% more. 360 Hz vs 240 Hz.
Both ship with comparable response time (gtg), dci-p3 coverage, panel type, 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: ASUS - ROG Swift PG39WCDM or MSI - MPG 271QRX?
ASUS - ROG Swift PG39WCDM leads the current Mars Score by 1.4 points.The more useful decision is the trade-off behind that result: compare screen size, refresh rate against the way you will actually use the product.
Choose ASUS - ROG Swift PG39WCDM if…
ASUS - ROG Swift PG39WCDM has the measurable edge on screen size in, peak brightness nits.
Choose MSI - MPG 271QRX if…
MSI - MPG 271QRX has the measurable edge on refresh rate hz, has usb c pd w.
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 ASUS - ROG Swift PG39WCDM wins
- ▲Screen size — 44.44% more. 39 " vs 27 ".
- ▲Peak brightness — 30.00% more. 1300 nits vs 1000 nits.
Why MSI - MPG 271QRX wins
- ▲Refresh rate — 50.00% more. 360 Hz vs 240 Hz.
- ▲USB-C Power Delivery — 8.89% more. 98 W vs 90 W.
Spec comparison
Panel
| Spec | ASUS - ROG Swift PG39WCDM | MSI - MPG 271QRX |
|---|---|---|
| Screen size | 39 "lead | 27 " |
| Panel typeⓘ | QD-OLED | QD-OLED |
| Resolutionⓘ | 1440p | 1440p |
| Aspect ratioⓘ | 21:9 | 16:9 |
| Curvedⓘ | truelead | false |
Performance
| Spec | ASUS - ROG Swift PG39WCDM | MSI - MPG 271QRX |
|---|---|---|
| Refresh rateⓘ | 240 Hz | 360 Hzlead |
| Response time (GtG)ⓘ | 0.03 ms | 0.03 ms |
| Peak brightnessⓘ | 1300 nitslead | 1000 nits |
| DCI-P3 coverageⓘ | 99 % | 99 % |
| HDRⓘ | true | true |
| G-Syncⓘ | true | true |
| FreeSyncⓘ | true | true |
Connectivity
| Spec | ASUS - ROG Swift PG39WCDM | MSI - MPG 271QRX |
|---|---|---|
| HDMI ports | 2 | 2 |
| DisplayPort ports | 1 | 1 |
| USB-C inputⓘ | true | true |
| USB-C Power Deliveryⓘ | 90 W | 98 Wlead |
| KVM | true | true |
Frequently asked
Which has higher refresh rate, ROG Swift PG39WCDM or MPG 271QRX?+
MPG 271QRX refreshes at 360Hz vs 240Hz.
Which has faster response time, ROG Swift PG39WCDM or MPG 271QRX?+
MPG 271QRX responds in 0.03ms vs 0.03ms.
Does ROG Swift PG39WCDM or MPG 271QRX have USB-C with power delivery?+
Both offer USB-C PD — 90W on ROG Swift PG39WCDM, 98W on MPG 271QRX.