When comparing LG 27UD68-W vs LG 34UC99-W, the Slant community recommends LG 27UD68-W for most people. In the question“What are the best monitors?” LG 27UD68-W is ranked 27th while LG 34UC99-W is ranked 91st. The most important reason people chose LG 27UD68-W is:
The 27UD68-W offers decent performance in bright environments, where it can get vivid enough to fight glare. The monitor can sustain the brightness of around 310 nits which means that the light coming from doors and windows will not be able to overpower the light that the panel emits.
Specs
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Pros
Pro Works well in bright rooms
The 27UD68-W offers decent performance in bright environments, where it can get vivid enough to fight glare. The monitor can sustain the brightness of around 310 nits which means that the light coming from doors and windows will not be able to overpower the light that the panel emits.
Pro Doesn't look cloudy
Unlike some other IPS monitors, the LG 27UD68-W doesn't suffer from the dirty screen effect that is usually caused by a panel's poor overall uniformity. Large objects and panning shots look uniform on the screen. The panel's overall uniformity measures at 3.11% dE - a solid result for a monitor in this price bracket.
Pro Good for multitasking
You can work with multiple windows at once thanks to a large amount of on-screen space the LG 34UC99-W offers. Its massive 34-inch 3440x1440 panel comes with a variety of split-screen presets that can fit multiple tabs.
Pro Immersive experience
The 34UC99-W creates that experience of immersion because it's large 34-inch widescreen panel is also curved. The display feels like it surrounds you.
Cons
Con Doesn't support HDR
You can't run HDR content on this monitor.
Con Bad for competitive gaming
The LG 34UC99-W isn't responsive enough for it to be used in competitive action gaming because of its high input lag and low native refresh rate.