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Deal.ai › Compare

LG QNED75B 75" 4K Smart TV vs Toshiba Z670R 55-Inch TV

The LG QNED75B is the bigger screen: 75 inches of mini-LED QNED with webOS and Google Assistant. The Toshiba Z670R is the better TV for motion and HDR: 144Hz, HDMI 2.1, Dolby Vision IQ and HDR10+, all on a 55-inch QLED panel. Pick the LG if size and the webOS app layout matter most. Pick the Toshiba if you game, watch sports, or care about Dolby Vision. Owners of the LG line praise color and the remote; the Toshiba's Fire TV platform is fast but more ad-heavy.

  • Choose the LG QNED75B if you sit far back and want the largest picture, with webOS and Google Assistant built in.
  • Choose the Toshiba Z670R if you game or watch fast motion and want Dolby Vision IQ, HDR10+ and HDMI 2.1 at 144Hz.

Prices

  • LG QNED75B 75" 4K Smart TV: $849.99 at Lowe's (last seen Nov 3)
  • Toshiba Z670R 55-Inch TV: $447.97 at Amazon (last seen Nov 12)
  • Difference: the Toshiba Z670R 55-Inch TV is $402.02 cheaper than the LG QNED75B 75" 4K Smart TV at the latest prices (Nov 3 and Nov 12)
LG
75" Class QNED AI QNED75B Mini LED 4K Smart TV

LG QNED75B 75" 4K Smart TV

75" Class QNED AI QNED75B Mini LED 4K Smart TV

$849.99at Lowe'sChecked Nov 3
See all prices and details
Visit Lowe's
Pros
  • Large 75-inch picture for big rooms
  • Mini-LED QNED panel with strong color
  • webOS is simple to navigate
  • Google Assistant built in
  • Game Optimizer and cloud gaming apps
Cons
  • 60Hz panel limits fast-motion smoothness
  • No Dolby Vision or HDR10+
  • Wi-Fi 5 only
  • 2.0 channel audio with no eARC listed
Toshiba
Toshiba Z670R 55-Inch

Toshiba Z670R 55-Inch TV

Toshiba Z670R 55-Inch

$447.97at AmazonChecked Nov 12
See all prices and details
Visit Amazon

Store links may earn us a commission. As an Amazon Associate, Deal.ai earns from qualifying purchases.

Pros
  • 144Hz panel suits gaming and sports
  • Dolby Vision IQ and HDR10+ support
  • Full array local dimming for deeper blacks
  • HDMI 2.1 with eARC and ALLM
  • AMD FreeSync Premium
Cons
  • 55 inches is much smaller
  • Fire TV interface carries more ads
  • Fewer smart-home assistant options listed

What separates them

LG QNED75B 75" 4K Smart TVToshiba Z670R 55-Inch TV
Screen size75 inches55 inches
Panel and backlightQNED mini-LED, direct backlightQLED mini-LED with full array local dimming
Refresh rate60Hz native144Hz
HDR formatsHDR10 and HLGDolby Vision IQ, HDR10+, HDR10+ Adaptable, HLG
HDMIHDMI without 2.1 features listedHDMI 2.1 with eARC and ALLM
Gaming featuresGame Optimizer, cloud gaming appsALLM, AMD FreeSync Premium, 144Hz
Smart platformwebOS 26 with Google AssistantFire TV
Audio2.0 channel, down-firingNot specified beyond eARC passthrough

Price history

$649.96$279.96
Nov 3Nov 12
  • LG QNED75B 75" 4K Smart TV: lowest $279.96 on Nov 3 at PC Richard & Son; $649.96 on Nov 9.
  • Toshiba Z670R 55-Inch TV: lowest $447.97 on Nov 3 at Amazon; $447.97 on Nov 12.

Prices at every store

LG QNED75B 75" 4K Smart TV

  • Lowe'sNew

    Availability unknown

    $849.99Checked Nov 3
    Visit Lowe's

Also available at

  • BrandsMart USACheck price at BrandsMart USA
  • AmazonCheck price at Amazon
  • ABC WarehouseCheck price at ABC Warehouse

Store links may earn us a commission.

Prices and history →

Toshiba Z670R 55-Inch TV

  • AmazonNew

    Availability unknown

    As an Amazon Associate, Deal.ai earns from qualifying purchases.

    $447.97Free shippingChecked Nov 12
    Visit Amazon
  • AmazonNew

    Availability unknown

    As an Amazon Associate, Deal.ai earns from qualifying purchases.

    $447.97Checked Nov 7
    Visit Amazon

Store links may earn us a commission.

Prices and history →

Specs compared

SpecLG QNED75B 75" 4K Smart TVToshiba Z670R 55-Inch TV
Screen size75"55 inches
Panel type4K QNED Mini LEDQLED
HDR supportHDR10 / HLGDolby Vision IQ, HDR10+, HDR10+ Adaptable, and …
Refresh Rate60 Hz144Hz
Resolution4K Ultra HD (3,840 x 2,160)—
Native refresh rate60Hz Native—
BacklightDirect—
Processorα7 AI Processor 4K Gen9—
Smart platformwebOS 26—
Audio channels2.0 channel—
Speaker typeDown Firing—
Bluetooth versionv 5.3—
Show all 29 specsShow fewer specs
SpecLG QNED75B 75" 4K Smart TVToshiba Z670R 55-Inch TV
Wi-FiWi-Fi 5—
High DefinitionYes—
HDTV Format4K—
ColorBlack—
Screen FormFlat—
Display TypeLED—
Assistant SupportGoogle Assistant—
HDRYes—
ConnectivityBluetooth, Wi-Fi, RF, USB, HDMI, Ethernet—
Supported Streaming ServicesNetflix, Prime Video, YouTube, HBO, Disney+

Questions and answers

Which is better for gaming?
The Toshiba Z670R. Its 144Hz panel, HDMI 2.1, ALLM and FreeSync Premium handle consoles and PCs far better than the LG's 60Hz set.
Which has the better picture?
The Toshiba has the edge on contrast and HDR, thanks to full array local dimming plus Dolby Vision IQ and HDR10+. The LG wins on sheer size at 75 inches.
Is the LG worth stepping up to over the Toshiba?
Only if screen size is your priority. The LG gives you 20 more inches and webOS, but the Toshiba beats it on refresh rate, HDR formats and HDMI 2.1.
Which lasts longer?
Neither brand publishes a lifespan figure. Both are LED-backlit sets; panel quality and warranty coverage matter more than brand here, so check each store's warranty terms.
Which is better for a bright living room?
The LG's larger mini-LED panel spreads brightness over more area, but the Toshiba's local dimming controls contrast better. For daytime sports at distance, the LG's size helps; for dark-room movies, the Toshiba.
Do both support the main streaming apps?
Yes. The LG runs webOS with Netflix, Prime Video, Disney+, HBO and YouTube. The Toshiba runs Fire TV, which carries the same major services.

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Buying guides that pick them

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—
Display technology—mini-LED with full array local dimming
Image engine—REGZA Engine ZRi Gen3
HDMI version—HDMI 2.1
Audio return channel—eARC
Auto low latency mode—ALLM
Adaptive sync—AMD FreeSync Premium
Operating system—Fire TV