Which is better for gaming?

Both run a 144Hz native panel with VRR up to 288 and Auto Game Mode. The 50 in lists Game Accelerator 288 versus 240 on the 55 in, but the 55 in adds more dimming zones. Pick the 55 in for a console setup unless desk space forces 50 in.

Is the 55 in worth $50 more?

Yes for most people. You get 5 more inches, up to 500 dimming zones and 40 W audio instead of 20 W for $50 at the November 7, 2026 prices.

Which has better picture quality?

The 55 in, on paper. More dimming zones and Dolby Vision IQ usually mean better contrast and brightness handling. Both use the same QD-Mini LED panel type and AiPQ Pro processor.

Which is easier to wall-mount?

The 50 in at 31 lb. The 55 in is 71.9 lb and needs a heavier-rated mount and a second person.

Do both run Google TV?

Yes. Both use Google TV with Google Assistant, Amazon Alexa and Siri support, and both have 4 HDMI ports and 2 USB ports.

Neither maker publishes a lifespan figure, so there is no basis to pick one. Buy the size that fits your room; both are 2025 QM6K models with the same panel technology.

TCL 50" QM6K QD-Mini LED 4K Google TV vs TCL QM6K 55" QD-Mini LED 4K TV

Buy the 55" QM6K if you want the bigger screen and more dimming zones; it is the better TV of the two. Buy the 50" QM6K if space or budget is tight and you want the lowest price. The 50" is $427.99 at Amazon as of November 7, 2026, and the 55" is $477.99 at Abt Electronics & Appliances as of the same date, a $50 gap.

Today the TCL 50" QM6K QD-Mini LED 4K Google TV costs $50.00 less at its best price.

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