When comparing LG 25UM57 vs LG 38UC99-W, the Slant community recommends LG 25UM57 for most people. In the question“What are the best monitors?” LG 25UM57 is ranked 6th while LG 38UC99-W is ranked 29th. The most important reason people chose LG 25UM57 is:
The fact that a monitor of this price range has a 5M:1 contrast ratio is simply astonishing. This means users get cinema-like picture quality right at their desk.
Specs
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Pros
Pro Cinema-like picture quality for an affordable price
The fact that a monitor of this price range has a 5M:1 contrast ratio is simply astonishing. This means users get cinema-like picture quality right at their desk.
Pro Good sound quality with no need for external speakers
This monitor's speakers are as good as those found on small TVs. They're located in the back and come with an audio jack for headphone connectivity.
Pro Immersive
The 2560x1080 resolution creates an immersive setup. This applies even for work tasks: multiple documents can be displayed side-by-side with no legibility sacrifice. It's equivalent to having two monitors with 1280x1080 screens.
Pro Advantageous for all uses
This monitor's ultrawide screen has advantages for all uses. When it comes to movie watching or gaming, the screen size contributes to a truly engaging experience. As far as general productivity goes, the ultrawide screen makes it easy to have different applications or documents open side by side.
Pro Great for watching movies
The 21:9 aspect ratio comes in handy when watching movies. This is the default aspect ratio at which almost all of the films are shot. Hence, you can watch your movies without having two black bars at the top and bottom of the screen.
Pro Excellent general purpose monitor
Impressive amount of on-screen real estate, excellent picture quality, exceptional connectivity, and great color accuracy puts the LG 38UC99-W above nearly all competitors in the market.
Pro Supports 85W charging over USB-C
You can charge your laptop and have display output through a single cable thanks to the monitor's USB-C port.
Pro Features On-Screen controls
You can access all the general features of this monitor using your mouse and a keyboard thanks to the LG’s On-Screen Control software.
Additionally, the On-Screen Control offers many screen split presets.
Pro Perfect for multi-tasking
Having enough display real-estate to fit three vertically aligned Google Docs windows comfortably, the LG 38UC99-W is an excellent tool to boost up the productivity in everyday office duties, CAD/CAM applications, and many other fields.
Pro Excellent for watching movies
Acing the near-cinematic aspect ratio of 21:9, the LG 38UC99-W is an excellent companion to watch movies because you won't see the black bars at the top and bottom of the screen when watching most movies.
Pro Has a pair of good speakers
The LG 38UC99-W features a built-in 20 Watt stereo speaker system which sounds fairly well compared to the 4-10 W speakers the competitors at this price point offer.
Pro Exceptional connectivity
This monitor beats most of its premium competitors in terms of connectivity because it features a USB-C downstream port which has multiple parallel functions. First, you can use it to access the monitor's onboard USB hub. Second, it can be used for charging a USB type C compliant laptop. Finally, you can use it to receive video and audio signal from a computer.
Additionally, the LG 38UC99-W has two HDMI ports, a DisplayPort, and an inbuilt Bluetooth module.
Pro Supports dual linkup
You can connect this monitor to two computers so that each machine use half of the on-screen area. This might come in handy for those who frequently use a stationary desktop computer and a laptop.
Pro Great picture quality
Only the best monitors can match the LG 38UC99-W's contrast ratio, peak brightness, gamma, and color accuracy, as the monitor features one of the finest IPS panels in the industry.
The LG 38UC99-W displays beautiful pictures, with deep and rich blacks, vibrant and accurate colors, and good-looking intermediate tones. Despite the fact that the monitor's native contrast ratio is only 1000:1, the dark scenes look deep and intense as the backlight of the 38UC99-W can drop below the brightness level of 0.15 nits, which only the best monitors can do. Colors pop and look vivid, as the 38UC99-W can sustain its brightness above the 300 nits mark. The mid-tones look lifelike thanks to the monitor's near perfect gamma value, which is only 1.3% off from the ideal value.
Moreover, the monitor's color inaccuracies can't be seen by the human eye because it only has an average color error dE of 2.12.
Cons
Con Limited connectivity
This monitor has two HMDI ports, which is pretty good. However, it misses other display inputs such as DVI or Display Port, making incompatible with older computers.
Con Lack of support for ultra-widescreen in (old) games
A handful of games do not support 21:9 aspect ratio by default. Some examples are Overwatch, Fallout 3, and Starcraft 2. If this is important for you, it is recommended you test this issue before getting this monitor. But there are solutions: you can either install fixes (only available for some games) or play in windowed mode, using a different aspect ratio.
Con Slow response time
A response time of 5 ms on a gaming monitor is pretty awful. Considering its refresh rate, it is understandable but not acceptable. Note that this response time is from gray-to-gray.
Con 720p and 1080p videos are sandwhiched
This monitor's aspect ratio means that many online videos, such as those from Netflix or YouTube, will have black spaces on the sides, which can be annoying.
Con Very expensive
For the same price as this monitor, you can buy three decent 27-inch ultrawide monitors.
Con Bluetooth indicator is inconvenient
The monitor's Bluetooth indicator occupies the on-screen workspace. Unfortunately, there is no way to remove the indicator while using the Bluetooth speaker option.
Con Has an external power brick
The external power supply unit of the LG 38UC99-W might cause inconvenience especially if you want to mount this monitor on a wall since the PSU is quite bulky.
Con Wobbly
The stand isn't rigid, so you might observe some minor wobbling if your work desk is flimsy,
Con OSD is quite messy
The on-screen-display of the LG 38UC99-W does not have any programmable shortcut keys and is quite hard to navigate.
For example, to enable or disable the motion blur reduction feature, you’ll need to press more than 15 keys because the menu goes very deep.
Con Unsuitable for gaming
Gaming just doesn't feel responsive because of the monitor's massive input lag.