It makes sense comparing Vizio M21d-H8 vs Samsung Q800B because they both are able to give some premium features. Based on our rating, M21d-H8 has a total rating of 5 out of 10 versus 9.2 for Q800B.
Both soundbars have active amplification type. A significant difference between the units in the number of channels, the Vizio M21d-H8 has 2.1 versus 5.1.2 for the Samsung Q800B. Only the Vizio M21d-H8 has a built-in subwoofer. The Vizio M21d-H8 got our rating of 5 out of 10, and the Samsung Q800B 8 for its audio features and specs.
Spotify support is available on the Q800B.
Only the Samsung Q800B can connect to the Internet via WI-FI. Rivals from our review have Bluetooth support. Each soundbar has 1/1 HDMI inputs/outputs. The HDMI Audio Return Channel (ARC) feature supports both devices. Both soundbars have a USB connector. For connectivity, the M21d-H8 received a rating of 6/10 versus 9/10, respectively. App control is available for the Q800B. A built-in microphone is present in each model. Soundbars do not have Multi-room support.
Only the Q800B has a Dolby Atmos multichannel audio format support. A surround technology DTS:X is supported only by the Q800B. For multichannel surround Vizio M21d-H8 got a rating of 5, and Samsung Q800B 10 out of 10.