Dell S2721QS 27" 4K UHD IPS Monitor vs LG DualUp 28MQ780-B 27.6" 16:18 Ergo Monitor
The Dell S2721QS 27" 4K UHD IPS Monitor is the mid-range contender, while the LG DualUp 28MQ780-B 27.6" 16:18 Ergo Monitor is the flagship option. In real-world use, the Dell delivers razor-sharp text clarity with its 4K resolution, but the LG offers a unique vertical workspace that mimics two monitors without the bezel gap. You'll appreciate the Dell’s 163 PPI for detailed tasks, while the LG’s impressive color accuracy at 98% DCI-P3 is a game changer for creators in 2026. Key specs: Display: 27" vs 27.6" and Weight: 225.75 oz vs 317.47 oz.
Why compare these? The Dell S2721QS 27" 4K UHD IPS Monitor (mid-range) and LG DualUp 28MQ780-B 27.6" 16:18 Ergo Monitor (premium flagship) represent different approaches to monitors. While they may appeal to different budgets, many buyers consider both options. This 2026 comparison helps you decide if the differences justify the price gap.
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Key Differences at a Glance
| Aspect | Dell S2721QS | LG DualUp |
|---|---|---|
| User Rating | 4.4★ (1,905 reviews) | ✓4.7★ (36 reviews) |
| Top Strength | Razor-sharp 4K resolution (163 PPI) delivers excellent text clarity | Unique 16:18 aspect ratio provides the vertical workspace of two 21.5-inch monitors without the bezel gap |
| Main Drawback | Limited to 60Hz, making it less suitable for fast-paced gaming | Strictly limited to 60Hz with no VRR, making it poor for gaming |
| Market Position | Mid-range | ✓Flagship |
Dell S2721QS 27" 4K UHD IPS Monitor
27" Viewable (27" Class)
3840 x 2160 (4K UHD)
16:9
IPS (In-Plane Switching)
LG DualUp 28MQ780-B 27.6" 16:18 Ergo Monitor
27.6" Viewable (28" Class)
2560 x 2880 (SDQHD)
16:18
Nano IPS
Only the specs that differ are shown here. Winners are highlighted when the data is clear.
+Full specs, pros, and cons
Everything side-by-side with ratings and the full spec list.
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Full specs, pros, and cons
Everything side-by-side with ratings and the full spec list.
Comparison: Dell S2721QS 27" 4K UHD IPS Monitor vs LG DualUp 28MQ780-B 27.6" 16:18 Ergo Monitor
Dell S2721QS 27" 4K UHD IPS Monitor
LG DualUp 28MQ780-B 27.6" 16:18 Ergo Monitor
| Criterion | Dell S2721QS 27" 4K UHD IPS Monitor | LG DualUp 28MQ780-B 27.6" 16:18 Ergo Monitor |
|---|---|---|
| Rating | ★4.4(1,905)Amazon | ★4.7(36)Best Buy |
Screen Size | 27" Viewable (27" Class) | 27.6" Viewable (28" Class) |
Resolution | 3840 x 2160 (4K UHD) | 2560 x 2880 (SDQHD) |
Aspect Ratio | 16:9 | 16:18 |
Screen Type | IPS (In-Plane Switching) | Nano IPS |
Refresh Rate | 60 Hz | 60 Hz |
Response Time | 4 ms (Gray-to-Gray Extreme Mode) | 5 ms (GtG) |
Brightness | 350 nits (Typical) | 300 nits (Typical) |
Contrast | 1,300:1 (Typical) | 1,000:1 (Typical) |
Color Gamut | 99% sRGB | 98% DCI-P3 (CIE1976) |
Color Depth | 1.07 Billion (10-bit via 8-bit + FRC) | 1.07 Billion (10-bit) |
HDR | HDR Playback Support (Not VESA Certified) | HDR10 |
Adaptive Sync | AMD FreeSync (40Hz - 60Hz) | No (Not supported) |
Viewing Angles | 178° (H) / 178° (V) | 178° (H) / 178° (V) |
Curvature | Flat | Flat |
Speakers | 2x 3 W (Stereo) | 2x 7 W (Stereo with MaxxAudio) |
Ports | 2x HDMI 2.0; 1x DisplayPort 1.2; 1x 3.5mm Audio Line-out | 2x HDMI 2.0; 1x DisplayPort 1.4; 1x USB-C (90W PD, Data, Video); 2x USB-A 3.0 Downstream; 1x USB-B 2.0 Upstream; 1x 3.5mm Headphone Out |
USB C | No | Yes (90W Power Delivery + Video + Data) |
Kvm | No | Yes (Built-in Auto KVM & PBP) |
Vesa | 100 x 100 mm | 100 x 100 mm |
Ergonomics | Height (110mm), Tilt (-5° to 21°), Swivel (-30° to 30°), Pivot (90°) | Ergo Stand (C-Clamp/Grommet): Extend/Retract (210mm), Swivel (±335°), Pivot (90° CCW), Height (130mm), Tilt (±25°) |
Power Consumption | 28 W (Typical) / 52 W (Max) / 0.3 W (Standby) | 40 W (Typical) / 190 W (Max) / 0.5 W (Sleep) |
Weight With Stand | 6,400 g (14.11 lbs) | 9,000 g (19.8 lbs) |
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Dell S2721QS 27" 4K UHD IPS Monitor
27" Viewable (27" Class)
3840 x 2160 (4K UHD)
16:9
IPS (In-Plane Switching)
60 Hz
4 ms (Gray-to-Gray Extreme Mode)
Pros
- Razor-sharp 4K resolution (163 PPI) delivers excellent text clarity
- Fully adjustable ergonomic stand (Height, Pivot, Swivel, Tilt) included
Cons
- Limited to 60Hz, making it less suitable for fast-paced gaming
- Lacks USB-C connectivity and USB data hub
LG DualUp 28MQ780-B 27.6" 16:18 Ergo Monitor
27.6" Viewable (28" Class)
2560 x 2880 (SDQHD)
16:18
Nano IPS
60 Hz
5 ms (GtG)
Pros
- Unique 16:18 aspect ratio provides the vertical workspace of two 21.5-inch monitors without the bezel gap
- Nano IPS panel covers 98% DCI-P3, offering professional-grade color accuracy for creators
Cons
- Strictly limited to 60Hz with no VRR, making it poor for gaming
- Unconventional aspect ratio (2560x2880) may require scaling tweaks in macOS/Windows
Which one is better?
The Dell S2721QS 27" 4K UHD IPS Monitor is the better buy for most people - its 4K resolution (3840 x 2160) crushes the LG DualUp's lower resolution. That said, grab the LG if you need a unique dual-display setup - it's worth considering for its ergonomic benefits.
Who should buy each?
Choose the Dell S2721QS 27" 4K UHD IPS Monitor if: you need razor-sharp text clarity for work, prefer a fully adjustable stand, or want a monitor that excels in media consumption. (27" display, 225.75 oz weight)
Choose the LG DualUp 28MQ780-B 27.6" 16:18 Ergo Monitor if: you require a vertical workspace that mimics two displays, need professional-grade color accuracy for creative work, or want USB-C connectivity for charging laptops. (27.6" display, 317.47 oz weight)
Quality Seekers
Higher user rating (4.7★ vs 4.4★) indicates better overall satisfaction
→ Choose LG DualUp
Safe Choice Buyers
More widely tested with 1,905 reviews vs 36
→ Choose Dell S2721QS
Premium Buyers
Higher-tier option with more premium features and build quality
→ Choose LG DualUp
Value Seekers
Better value proposition for buyers who don't need top-tier features
→ Choose Dell S2721QS
Conclusion
Dell S2721QS 27" 4K UHD IPS Monitor and LG DualUp 28MQ780-B 27.6" 16:18 Ergo Monitor are both solid choices. Match the strengths above to your budget and workflow to make the best call.
Bottom line: The LG DualUp 28MQ780-B 27.6" 16:18 Ergo Monitor leads with a 4.7★ rating versus 4.4★. That said, Dell S2721QS 27" 4K UHD IPS Monitor could still be the right pick depending on your specific priorities.
Frequently Asked Questions
+Which is better: Dell S2721QS 27" 4K UHD IPS Monitor or LG DualUp 28MQ780-B 27.6" 16:18 Ergo Monitor?
Dell S2721QS 27" 4K UHD IPS Monitor is the better choice if you prioritize razor-sharp 4k resolution (163 ppi) delivers excellent text clarity. LG DualUp 28MQ780-B 27.6" 16:18 Ergo Monitor wins if you value unique 16:18 aspect ratio provides the vertical workspace of two 21.5-inch monitors without the bezel gap. Both are rated highly (4.4★ vs 4.7★), so consider your specific needs and budget.
+What are the main differences between Dell S2721QS 27" 4K UHD IPS Monitor and LG DualUp 28MQ780-B 27.6" 16:18 Ergo Monitor?
Key differences: Dell S2721QS 27" 4K UHD IPS Monitor offers razor-sharp 4k resolution (163 ppi) delivers excellent text clarity, while LG DualUp 28MQ780-B 27.6" 16:18 Ergo Monitor stands out with unique 16:18 aspect ratio provides the vertical workspace of two 21.5-inch monitors without the bezel gap. Consider that Dell S2721QS 27" 4K UHD IPS Monitor limited to 60hz, making it less suitable for fast-paced gaming. Meanwhile, LG DualUp 28MQ780-B 27.6" 16:18 Ergo Monitor strictly limited to 60hz with no vrr, making it poor for gaming. Check the detailed specs table above for a complete comparison.
+Where can US buyers get the best price?
For US buyers, Amazon typically offers competitive pricing with Prime shipping, easy returns, and reliable warranty support. We recommend comparing prices on both products using our affiliate links above—prices fluctuate regularly, and you may find sales or deals.
+Is this comparison up to date?
Yes, this comparison is current for 2026. We regularly verify specs, ratings, and availability. Last verified: January 26, 2026. PageBen uses affiliate links for monetization, but our recommendations are research-driven and independent.
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