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TCL S4 55" 4K Roku TV vs LG Nano 4K UHD AI NU70 Smart TV

The TCL S4 is the safer pick for most shoppers: it has four HDMI inputs, supports HDR10+ and HLG, and runs Roku TV, which owners consistently call simple and fast. The LG NU70 has the stronger processor on paper, an a7 AI Gen9 chip with AI upscaling and the Magic Remote, but its listing shows only two HDMI ports and HDR10/HLG without HDR10+. TCL's 4.4 average across a very large owner base points to solid everyday reliability; LG's Nano line is better built and smoother with motion processing, but this model is a step-down set in LG's range.

  • Choose the TCL S4 if you want the most inputs, the widest HDR format support and the easiest smart interface for a busy household.
  • Choose the LG NU70 if you value LG's processing, the Magic Remote and webOS, and you can live with two HDMI ports.

Prices

  • TCL S4 55" 4K Roku TV: $3.10 at Mercari (last seen Nov 7)
  • LG Nano 4K UHD AI NU70 Smart TV: $249.99 at Best Buy (last seen Nov 8)
  • Difference: the TCL S4 55" 4K Roku TV is $246.89 cheaper than the LG Nano 4K UHD AI NU70 Smart TV at the latest prices (Nov 7 and Nov 8)
TCL
TCL 55” Class S4 4K UHD HDR Smart TV with Roku TV

TCL S4 55" 4K Roku TV

TCL 55” Class S4 4K UHD HDR Smart TV with Roku TV

4.4(68,402 ratings)
$3.10at MercariObserved Nov 7, 2026, 11:20 PM
See all prices and details
Visit Mercari
Pros
  • Four HDMI inputs suit a console, soundbar and two streamers
  • HDR10+ support adds dynamic metadata on top of HDR10 and HLG
  • Roku TV is widely praised by owners as easy to set up and quick to turn on
  • Large owner base with a 4.4 average rating
Cons
  • 60 Hz panel with no variable refresh rate or gaming mode worth the name
  • Basic upscaling next to LG's AI processing
  • Average built-in sound; a soundbar helps
LG
LG 55-Inch Class Nano 4K UHD AI NU70 Smart TV (2026)

LG Nano 4K UHD AI NU70 Smart TV

LG 55-Inch Class Nano 4K UHD AI NU70 Smart TV (2026)

4.3(4 ratings)
$249.99at Best BuyObserved at 9:58 PM
See all prices and details
Visit Best Buy
Pros
  • a7 AI Gen9 processor with AI Super Upscaling and Nano Detail Enhancer
  • Magic Remote and webOS 26 are fast and pleasant to navigate
  • Bluetooth 5.3 and Ethernet in addition to Wi-Fi
  • Lighter set at 18.3 lb, easier to wall mount
Cons
  • Only two HDMI inputs
  • No HDR10+ support
  • 60 Hz panel with no advanced gaming features
  • Nano cell layer adds little over a standard LED at this tier

What separates them

TCL S4 55" 4K Roku TVLG Nano 4K UHD AI NU70 Smart TV
Smart platformRoku TV: simple home screen, one-touch app keys, quick startupwebOS 26: app-rich, Magic Remote pointer control
HDMI inputs42
HDR formatsHDR10+, HDR, HLGHDR10, HLG (HDR10 Pro processing)
Picture processorStandard 4K upscalinga7 AI Processor 4K Gen9 with AI Super Upscaling and Nano Detail Enhancer
Refresh rate60 Hz60 Hz
RemoteCompact Roku remote with channel shortcutsMagic Remote with pointer and voice
AudioDolby Digital Plus decoding2.0 channel, AI sound processing
Weight22.5 lb18.3 lb

Price history

$399.99$3.10
Oct 30Nov 9
  • TCL S4 55" 4K Roku TV: lowest $3.10 on Nov 8 at Mercari; $399.99 on Nov 9.
  • LG Nano 4K UHD AI NU70 Smart TV: lowest $229.99 on Nov 4 at LG; $229.99 on Nov 9.

Prices at every store

TCL S4 55" 4K Roku TV

  • MercariNew

    In stock

    $3.10+ $12.99 shippingObserved Nov 7, 2026, 11:20 PM
    Visit Mercari
  • WalmartNew

    In stock

    $228.00Free shippingVerified
    Visit Walmart
  • eBayNew

    Availability unknown

    $297.46Observed Nov 5, 2026, 8:46 AM
    Visit eBay
  • TalkShopLiveNew

    Availability unknown

    $334.98Observed Nov 5, 2026, 8:46 AM
    Visit TalkShopLive

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All 5 stores and price history →

LG Nano 4K UHD AI NU70 Smart TV

  • Best BuyNew

    In stock

    $249.99Free shippingObserved at 9:58 PM
    Visit Best Buy
  • LGNew

    In stock

    $249.99Free shippingObserved at 9:58 PM
    Visit LG
  • Jetson's ApplianceNew

    In stock

    $249.99Observed at 9:58 PM
    Visit Jetson's Appliance
  • Abt Electronics & AppliancesNew

    In stock

    $249.99+ $45.97 shippingObserved at 9:58 PM
    Visit Abt Electronics & Appliances

Also available at

  • Beach CameraCheck price at Beach Camera
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  • eBayCheck price at eBay

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All 10 stores and price history →

Specs compared

SpecTCL S4 55" 4K Roku TVLG Nano 4K UHD AI NU70 Smart TV
colorBlackBlack
Screen size55 in50 inches
Refresh rate60 Hz60 Hz
HDMI inputs4HDMI x2
Weight22.5 lb18.3 lb
Resolution4K UHD3840 x 2160
High DefinitionYesYes
HDTV Format4K4K
Screen FormFlatFlat
Display TypeLEDLED
Assistant SupportGoogle Assistant, Amazon Alexa, SiriGoogle Assistant, Amazon Alexa
HDRYesYes
Show all 40 specsShow fewer specs
SpecTCL S4 55" 4K Roku TVLG Nano 4K UHD AI NU70 Smart TV
ConnectivityWi-Fi, HDMI, EthernetBluetooth, Wi-Fi, RF, USB, HDMI, Ethernet
Supported Streaming ServicesHulu, Netflix, YouTube, HBO, Disney+, RokuNetflix, Prime Video, YouTube, HBO, Disney+
Depth3.2 in deep2.8 in deep
HDMI Ports4 HDMI ports2 HDMI ports
Maximum resolution2160p (4K)—
Display resolution3840 x 2160—
Display technologyLED—
HDR formatsHDR10+, HDR, HLG—
Smart TV platformRoku TV

What reviewers say

TCL S4 55" 4K Roku TV

  • 4.4 / 568,402 ratings

With 4.4 out of 5 from over 68,000 ratings, buyers mostly call the S4 a good picture at a low price and easy to use. Praise centers on image quality, quick startup and simple programming; criticism is thinner but points at sound and dark-scene performance.

What people mention
  • Picture qualityPraisedBuyers say the 4K image is clear and good for the price.
  • Ease of usePraisedOwners find the Roku interface and remote simple to learn.
  • ValuePraisedReviewers repeatedly call it a great TV at a low price.
  • SoundCriticisedOwners say the built-in speakers are thin and a soundbar is worth adding.

Questions and answers

Which is better for gaming?
Neither is a gaming set. Both are 60 Hz with no variable refresh rate or HDMI 2.1, so a PS5 or Xbox runs at 60 fps at best. The TCL's four HDMI ports make it easier to keep a console and a soundbar connected.
Which has the better picture?
The LG has the better processing: the a7 AI Gen9 chip upscales HD and SD content more cleanly and sharpens detail. The TCL counters with HDR10+ support, which helps on some streaming titles. For most 4K streaming, the gap is modest.
Which is easier to use?
Roku TV on the TCL is the simpler interface, and owners often mention fast startup and easy setup. LG's webOS is also well organized and the Magic Remote pointer is handy, but it has more layers to learn.
Do I need more than two HDMI ports?
If you have a cable box, a console and a soundbar, yes. The LG's two ports fill up fast and you would need a switch. The TCL's four ports cover a typical living room without one.
Which lasts longer?
Both are budget-to-mid LED sets with similar panel life expectations. The TCL has a much larger owner base reporting on reliability, while the LG's 2026 model is newer with less long-term feedback. Neither brand stands out for longevity at this tier.
Is the LG worth stepping up to over the TCL?
Only if you want LG's processing and the Magic Remote and do not need many inputs. Otherwise the TCL gives you more connectivity and HDR10+ for less compromise in daily use.

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—
Sound technologyDolby Digital Plus—
Built-in tunerATSC—
VESA mounting pattern200 x 200—
Smart TV FeaturesNetflix—
PlatformRoku TV—
High Dynamic Range FormatHDR10+, HDR, HLG—
HDMI Number4—
DisplayLED—
Smart TechY—
Television Type4K Ultra HD TVs—
Video Streaming QualityUHD—
Virtual AsstSiri, Alexa, and Google Assistant—
Wireless TechnologyWi-Fi, 802.11ac—
Mount TypeFreestanding, Wall Mount—
Assembled Product Height29.8 in—
Assembled Product Weight22.5 lb—
Depth (With Stand)10.1 in—
Depth (Without Stand)3.2 in—
Height (With Stand)29.8 in—