LG 86QNED85AUA 86" VS TCL 75C6K 75"

Both the LG 86QNED85AUA and the TCL 75C6K share the same 4K resolution, 144Hz refresh rate, 10-bit color depth, and 1.07 billion display colors, making their baseline image quality credentials very similar on paper. The most obvious practical difference is sheer size: the LG delivers an 86.4-inch panel versus the TCL's 74.5-inch one — a gap that meaningfully changes the sense of immersion in a large room. Conversely, because both panels carry the same pixel count, the smaller TCL actually achieves a slightly higher pixel density of 59 ppi versus the LG's 51 ppi, which can translate to marginally sharper fine detail at close viewing distances.

Where the TCL pulls ahead most clearly is in its panel technology and HDR ecosystem. The TCL adds a QLED layer to its Mini-LED LCD stack, which typically expands the color gamut and boosts peak brightness compared to a standard Mini-LED LCD like the LG. More critically, the TCL supports Dolby Vision and HDR10+ in addition to HDR10 and HLG, while the LG is limited to HDR10 and HLG only. This matters because Dolby Vision and HDR10+ use dynamic metadata — adjusting tone-mapping scene by scene — which can produce noticeably more nuanced highlights and shadows on supported content. The TCL also adds AMD FreeSync Premium Pro on top of the standard FreeSync and FreeSync Premium tiers that both TVs share, offering low-framerate compensation for a smoother gaming experience at variable frame rates.

In summary, the TCL 75C6K has a clear technical edge in display quality features: broader HDR format support, a richer panel technology, and a more complete adaptive-sync stack. The LG 86QNED85AUA's advantage is purely its larger screen, which is a legitimate and important consideration for big-room viewing but does not offset the TCL's superior HDR and color capabilities on a spec-for-spec basis.

The wired connectivity foundation is identical between the two TVs: both offer 4 HDMI 2.1 ports, 2 USB ports, and a single RJ45 ethernet jack — a solid and modern setup that supports 4K/144Hz passthrough on all HDMI inputs and is unlikely to leave either buyer short on connections.

The more meaningful differences emerge in wireless capabilities. The LG supports Wi-Fi 6E (802.11ax) in addition to Wi-Fi 4, 5, and 6, whereas the TCL tops out at Wi-Fi 5 (802.11ac). Wi-Fi 6E opens up the uncongested 6GHz band, which can deliver noticeably lower latency and more stable throughput in households with many competing wireless devices — a real advantage for 4K streaming or cloud gaming. On the Bluetooth side, the TCL edges ahead with Bluetooth 5.4 versus the LG's 5.3, though the practical difference between these two adjacent versions is minimal for typical TV use cases like connecting soundbars or headphones.

One understated distinction is the TCL's inclusion of a 3.5mm audio jack, which the LG lacks entirely. For users who want to plug in wired headphones directly to the TV — a common need for late-night viewing — this is a genuinely useful convenience the LG simply cannot match. Overall, the connectivity edge is split: the LG wins on wireless networking with its Wi-Fi 6E support, while the TCL offers a small but practical advantage with its headphone jack.

Audio is arguably the spec group where these two TVs are most closely matched. Both carry stereo speakers with a built-in subwoofer, support the full Dolby suite — Dolby Digital, Dolby Digital Plus, Dolby Atmos, and Dolby Audio — and provide both HDMI ARC and eARC outputs for connecting external sound systems. The presence of eARC on both is worth highlighting, as it allows lossless high-bandwidth audio formats to pass through to a compatible soundbar or receiver, future-proofing the setup beyond what standard ARC can handle.

The single differentiator in this group is the TCL's support for DTS:X, which the LG lacks. DTS:X is an object-based surround format — a direct competitor to Dolby Atmos — commonly found on Blu-ray discs and certain streaming platforms. For users who own a DTS:X-capable soundbar or AV receiver, the TCL will pass that signal through natively, while the LG would require the external device to handle decoding independently or fall back to a lesser format.

For most households relying on streaming services, the DTS:X gap is unlikely to surface often, as Dolby Atmos dominates that space. But for physical media enthusiasts or those with a DTS:X sound system, the TCL holds a narrow but real advantage. Overall, the TCL takes a slight edge in audio compatibility purely on the strength of that added format support.

Size differences between these two TVs are expected given the screen gap, but the weight disparity is striking. The LG tips the scales at ~51 kg compared to the TCL's ~23.5 kg — more than double. That gap has real installation consequences: the LG will almost certainly require two people and potentially professional mounting hardware rated for the load, whereas the TCL is manageable enough for a standard wall-mount installation without special reinforcement.

Interestingly, the physical profile tells a different story. Despite being the heavier, larger set, the LG is notably slimmer at 30.5 mm deep versus the TCL's 56.7 mm. For wall-mount installations where a low-profile look matters, the LG will sit considerably flatter against the wall — an aesthetic advantage that partially offsets the handling difficulty. Both TVs support VESA mounting, so neither restricts the buyer to proprietary stand solutions.

On balance, neither product dominates this category cleanly. The LG wins on slim profile, while the TCL's dramatically lower weight makes it far easier to transport, install, and reposition. For buyers prioritizing ease of installation or frequent room changes, the TCL has a meaningful practical edge. For those who want the flattest possible wall mount and have the infrastructure to support a heavier unit, the LG's 30.5 mm depth is a genuine draw.

Across every feature listed in this group, the LG 86QNED85AUA and the TCL 75C6K are a perfect match — spec for spec, without a single differentiator. Both run a built-in smart TV platform, support AirPlay, respond to Google Assistant and Alexa, allow smartphone remote control, and share an identical 0.5W standby power consumption. Neither supports Siri or Apple HomeKit, and neither ships with a rechargeable remote.

A few of the shared features are worth contextualizing. USB recording on both sets means users can connect an external drive to record live broadcasts — a capability that is increasingly rare and genuinely useful for households without a dedicated DVR. The universal voice assistant support across both Google and Amazon ecosystems is also a practical convenience, covering the vast majority of smart home setups without forcing the buyer into a specific platform.

This is a clear and complete tie. There is no basis in the provided specs to give either TV an edge in features — every capability present on one is equally present on the other. A buyer's decision in this category comes down entirely to factors outside this spec group.