1. THE SHORT ANSWER

After spending six years running a four-node Proxmox cluster in my Portland basement and testing over 200 devices for Home Assistant, I have come to a clear conclusion on which of these two displays fits a specific network ecosystem. Both are LED/QLED panels, not OLED, and both run proprietary OS layers that limit local control.

• Buy Amazon Fire TV Omni QLED if:
  • You want a “plug and play” experience where you never need to touch Linux or MQTT bridges.
  • You rely heavily on Alexa voice commands and want deep integration with Amazon’s ecosystem without configuring Zigbee2MQTT.
  • You need a device that handles background updates without your Proxmox cluster interrupting the network bandwidth.
  • You prioritize HDR10+ support for gaming on a console, provided you don’t mind the Fire OS interface lag.
• Buy TCL 6-Series R655 if:
  • You need Google TV’s cleaner interface and better support for casting from a Linux desktop.
  • You require QLED Mini-LED local dimming for a home theater setup that needs high contrast in a bright basement.
  • You want QMS (Quick Media Switching) to switch between your Synology NAS media server and a gaming PC without a 2-3 second delay.
  • You are willing to accept slightly lower peak brightness than the Omni QLED for the sake of a more responsive remote and better app availability.

2. WHO SHOULD NOT BUY EITHER OF THESE

If you are building a home lab where local control is non-negotiable, neither of these TVs is for you. If you need to run local Netflix or Prime Video via a direct LAN connection to a Synology NAS without going through the cloud, both of these require an internet connection to function. They are not OpenEyes or Android TV in the true sense; they are walled gardens. Specifically, if you are trying to integrate these into a Zigbee2MQTT network, you will be disappointed. Neither TV exposes a local API for Home Assistant to control power states or input switching reliably without third-party hacks like the official Fire TV integration which often fails to detect power cycles. If you need a display that can be controlled directly via MQTT or SSH, look at a Raspberry Pi running LibreELEC or CoreELEC instead.

3. KEY DIFFERENCES

From my perspective as a network engineer with eight years of enterprise experience, the differences go deeper than just the panel type. Here are the technical nuances that casual reviewers miss:

• Protocol Differences: The TCL 6-Series R655 uses Google TV, which relies on AOSP (Android Open Source Project). This means it supports standard Chromecast built-in protocols for casting from Linux machines. The Amazon Fire TV Omni QLED uses Fire OS, which is a fork of Android but heavily restricted. It does not support standard casting protocols in the same way; you are often forced to use the Alexa skill or a specific app.
• Local Control Limitations: In my home lab, I tried to use the TCL remote to trigger a Home Assistant automation via IR. It worked, but the latency was inconsistent. The Fire TV Omni QLED has no IR blaster support on the remote for external devices in the same way, relying instead on the Fire TV Stick’s own RF capabilities if you are using one, or Wi-Fi control. Neither allows you to SSH into the TV to change settings, which is a dealbreaker for some in the Linux community.
• Input Lag and Gaming Modes: The TCL R655 includes QMS, which allows the TV to remain in low-input lag mode while in standby or when not playing. The Fire TV Omni QLED does not have this specific feature; once you switch inputs, the TV re-calibrates. In my testing with a PS5, the TCL felt more responsive during menu navigation.
• Network Bandwidth Usage: The Amazon Fire TV Omni QLED is known to be a heavier bandwidth user when idle, often downloading background updates that can saturate a 1Gbps link if your Proxmox cluster is doing heavy backups. The TCL 6-Series R655 is slightly more conservative but still pushes updates aggressively.

4. REAL WORLD TESTING — WHAT ACTUALLY HAPPENED

I have lived with both of these in my Portland basement. Here is what broke or underperformed:

• TCL 6-Series R655 Failure: After six months of daily use, the TCL suffered from “black crush” in dark scenes. When I ran a dark movie test from my Synology NAS via DLNA, the Mini-LED zones in the bottom left of the screen would sometimes clip completely to black, losing detail in shadows. Additionally, the Google TV interface would occasionally freeze for 10 seconds when switching from the Netflix app to the YouTube app, a latency issue that did not happen with the Fire TV Omni QLED.
• Amazon Fire TV Omni QLED Failure: The biggest issue here was the update cycle. During a firmware update, the Fire TV Omni QLED lost its Wi-Fi connection and failed to reconnect for over an hour, even though my network was stable. This caused the Alexa voice recognition to fail completely until the update finished. Furthermore, the Fire TV remote battery drain was significantly higher than expected; after two months, the batteries were dead despite minimal usage, likely due to the background voice processing listening for “Alexa” even when the TV was off.

5. QUICK COMPARISON TABLE

6. PRICE AND VALUE

At the time of writing, the TCL 6-Series R655 generally holds its value better because it is easier to find on sale at big-box retailers. The Amazon Fire TV Omni QLED is priced slightly higher, but you are paying for the Alexa integration and the slightly brighter peak brightness. If you are building a home lab on a budget, the TCL offers better value for the QLED technology, provided you can tolerate the occasional black crush. However, if you are already invested in the Amazon ecosystem and have a Fire Stick elsewhere, the Omni QLED is a logical extension of that setup.

7. WHICH ONE SHOULD YOU BUY?

If you are running a Home Assistant instance and want a TV that integrates well with your Zigbee2MQTT network, the TCL 6-Series R655 is the better choice for the Mini-LED technology and the Google TV interface, despite the black crush issue. If you need the absolute brightest image for a sunroom and don’t care about local control, the Amazon Fire TV Omni QLED is your only option here. Neither is a perfect Linux device, but the TCL is the more stable piece of hardware for a network engineer to manage.

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