Sony X940E 75" (XBR75X940E) vs TCL S405 49" (49S405)

The X940E's performance can be considered on par with the OLEDs in this price range. It has everything necessary for true HDR: high native contrast (4941:1, can go up to 11634:1 with local dimming enabled), wide color gamut, great black levels and uniformity. Beyond all that, its panel is one of the best in the market — even in a bright room, this TV can still really shine because of how bright it can get.

Local dimming is the TV's ability to dim areas of the screen for deeper black levels and better contrast — they are separated into different dimming zones, where each zone can be individually dimmed as needed. The local dimming on the X940E is the best in LED TVs of 2017 — it is capable of doubling the contrast ratios from 4941:1 to 11634:1. The only other LED TV with this capability is the VIZIO P65-E1, but its contrast with local dimming enabled is lower than the X940E's (at ~9.3k:1).

The user interface of modern smart TVs can include some advertisements similar to those on the internet or in a mobile app. The X940E does not include any, and it also has a feature for limiting ads in third-party applications.

The X940E can handle dark scenes very well thanks to its high native contrast levels, which clocks in at 4941:1 native, and it can go up to 11634:1 with local dimming enabled. This, along with excellent black levels and uniformity, gives the TV the ability to achieve great representations of dark scenes beyond most expectations.

The black levels of a TV affects the viewer’s perception of other colors next to it. If the black levels are not deep enough and doesn’t remain uniform across the screen, the overall picture quality will look “flat” without much depth. The X940E handles this extremely well with one of the lowest deviation (<0.6%) ever in a non-OLED panel. This is measured across the entire screen from what a pure black screen should be, giving it significant gains in its native contrast levels thereby increasing the picture quality by a ton.

The X940E has a practical peak brightness of ~1,100nits for both SDR and HDR content — this is by far the second brightest ever in a VA panel, only bested by the X930E. It can sustain this level of brightness when playing content and it will not have any issues with fighting light in bright environments thanks to its virtually reflection-less panel.

The X940E runs on Android TV — normal Android apps from the Google Play Store (or other app stores) will work on it.

Unlike the OLED panels in this price range, the X940E has a VA panel and thus it does not suffer from image retention issues.

The X940E shines in dark environments — it is great at reproducing dark scenes, making it suitable for enjoying media in a cinema-like setting. It performs extremely well in movies with many black highlights/scenes where this is immediately noticeable even to undiscerning viewers (e.g. Interstellar).

The X940E's panel has a glossy finish, unlike the X930E which has a semi-gloss finish. This, along with its ability to get very bright, means that this TV is excellent at handling reflections — even in a bright room, the picture quality will remain more or less the same.

The color gamut of a TV refers to the range of colors the display can reproduce — the wider the color gamut, the more colors it can display, and the better the overall picture quality will be. This is extremely important for HDR content because it requires a much wider color gamut than SDR content. The X940E has no issues with accurately reproducing the colors necessary for true HDR because its color gamut is one of the widest and only bested by some OLEDs.

The X940E is the best LED TV of 2017, outperforming its competitors in nearly every aspect. Its picture quality is top-notch for any kind of content and it can handle all sorts of use cases really well.

The S405 strikes a nice balance between picture quality, screen size, and input lag, all for an affordable price of below $500. It's a great choice for watching and gaming casually without breaking the bank.

Compared to its direct competitors, it offers decent picture quality that is a tad below them, bigger screen size, and lower input lag.

Content looks decent enough for most casual viewers - the black levels are sufficiently deep, colors are vivid, and it gets bright enough for most types of content in a dark room.

The size difference is pretty huge as options with similar size of 49", or even smaller, cost fairly more than the S405.

Its low input lag of ~15ms contributes to a more responsive gaming experience. It's barely noticeable, and it’s also one of the lowest among 4K TVs, which is an impressive feat in this price bracket.

The S405 works well as a computer monitor thanks to its low input lag, barely noticeable motion blur, and full 4:4:4 color support. The 43" model can even be used up close due to its small minimal viewing distance.

The low input lag and low motion blur of ~15ms makes it highly responsive to input and gives it the ability to handle dynamic content well.

It also has full 4:4:4 color support, so text or shapes with hard edges on the screen won't be blurry.

The S405 is a good pick for watching sports thanks to its low motion blur and reasonably consistent color uniformity.

Fast-moving objects, like footballs, won't leave any visible trails on the screen due to the low motion blur of ~15ms. While there are slight uniformity inconsistencies in the edges of the panel when displaying large, uniform objects on the screen, like football fields, the issues generally go unnoticed by most.

The S405 runs on the Roku TV smart platform, touted for its simple, straightforward, and lag-free UI.

It’s easy for anyone to grasp how navigation works, thanks to its two-column design with the menu on the left and options on the right.

There’s also no noticeable lag during navigation or menu selection.

The S405 is excellent for gaming - the overall experience will be very responsive and fluid, thanks to the really low input lag and barely noticeable motion blur.

It has an input lag of ~15ms that makes the TV highly responsive to user input - gamers will have no issues keeping their actions in sync with what's on the display. The panel can fully change its pixels color in under 15ms, resulting in fast-moving objects not leaving any trails on the screen, eliminating virtually all motion blur.

It's also suitable for HDR gaming because there is no increased input lag for HDR, and it has full 4K support @ 60 FPS, which makes it suitable for all new 4K games.

The S405 has no ads on its main interface, although there can be ads in third-party applications. Third-party ads can't be blocked, but the tracking and personalization can be limited through the TV's settings.

The S405 is excellent at reproducing colors accurately out of the box.

Even without calibration, the colors are spot-on - they're very close to what the source signal demands and any inaccuracies are generally considered imperceptible to most end users.

The overall average difference between the source signal and the panel's reproduction of the color is measured in Delta-E, where lower means better accuracy. The S405 has a Delta-E of below 2.0, and anything below 3.0 is generally considered accurate for most end users.

The S405 looks decent with adequately deep black levels, above-average color accuracy, and sufficient peak brightness levels for most content.

It’s especially great at reproducing dark scenes thanks to the panel’s contrast ratio of about 4000:1, which means blacks can get really dark at about 4000 times darker than the brightest white it can produce.

Colors are spot-on even without calibration, and the panel can get bright enough with a peak brightness level of ~200 nits to make them pop in dark environments.

The best viewing experience will be in a dark environment where the panel won’t have to compete with light. The S405’s screen can’t really get bright enough to perform as well in bright environments.

Even when the S405 is mounted on a wall, you'll still have access to all essential inputs and outputs which are situated on the side of the unit.

The S405 is versatile enough to be used as a general-purpose display.

The picture quality is decent for movies and TV shows, and it checks all the boxes that make a TV suitable for gaming, sports, and as a computer monitor: low input lag, low motion blur, good screen uniformity, and full 4:4:4 color support.