Samsung HW-Q90R vs LG SLM4R comparison definitely makes sense. Based on our rating, HW-Q90R has a total rating of 8.2 out of 10 versus 5.2 for SLM4R. The competitors' control buttons are different: power, volume down, volume up, source and power, volume down, volume up, function, respectively.
Both soundbars have active amplification type. A significant difference between the units in the number of channels, the Samsung HW-Q90R has 7.1.4 versus 4.1 for the LG SLM4R. The output power is different and equal to 512 (overall) W for the HW-Q90R versus 420 (overall) W for the SLM4R. Competitors do not have a built-in subwoofer. Rivals have wireless connection to separate subwoofer. The Samsung HW-Q90R got our rating of 9 out of 10, and the LG SLM4R 7 for its audio features and specs.
Soundbars do not have AirPlay support. Spotify support is available on the HW-Q90R.
Only the Samsung HW-Q90R can connect to the Internet via WI-FI. Rivals from our review have Bluetooth support. Only the HW-Q90R supports HDMI Audio Return Channel (ARC). Both soundbars have a USB connector. For connectivity, the HW-Q90R received a rating of 7/10 versus 6/10, respectively. App control is available in every soundbar. A built-in microphone is present only on the HW-Q90R. Multi-room is only available for the Samsung HW-Q90R.
Only the HW-Q90R has a Dolby Atmos multichannel audio format support. A surround technology DTS:X is supported only by the HW-Q90R. For multichannel surround Samsung HW-Q90R got a rating of 10, and LG SLM4R 5 out of 10.