Which is better for dark rooms?

The Roku Plus Series. Its Mini-LED backlight dims in zones, which gives deeper blacks than the VIZIO's standard QLED backlight.

Is the Roku worth $130 more?

For most buyers, yes. You get Mini-LED, a fourth HDMI port, Dolby Atmos and eARC. If $248 is your ceiling, the VIZIO is a solid 55-inch QLED.

Which has better sound?

The Roku. It supports Dolby Atmos and has eARC, so a soundbar connects over one cable. The VIZIO uses DTS Virtual:X with no eARC listed.

Do both handle 4K gaming the same?

Both are 60 Hz panels, so neither offers 120 Hz gaming. The Roku's extra HDMI port makes it easier to keep a console and a soundbar connected.

Which has more HDMI ports?

The Roku has four; the VIZIO has three.

Which is cheaper right now?

The VIZIO: $248 at Sam's Club as of November 7, 2026, against $378 at Walmart for the Roku.

VIZIO Quantum 4K QLED 55" TV (VQD55R-10) vs Roku Plus Series 55" QLED Mini-LED TV

The Roku Plus Series is the better TV: Mini-LED backlighting, four HDMI ports, Dolby Atmos and eARC, and a 4.7 rating. The VIZIO VQD55R-10 costs $248 at Sam's Club as of November 7, 2026, while the Roku is $378 at Walmart as of the same date. That $130 gap buys real hardware, so pick the VIZIO if budget rules and the Roku if picture quality and connectivity do.

Today the VIZIO Quantum 4K QLED 55" TV (VQD55R-10) costs $130.00 less at its best price.

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