LG S90QY vs LG SLM4R comparison definitely makes sense. Based on our rating, S90QY has a total rating of 8 out of 10 versus 5.2 for SLM4R.
Both soundbars have active amplification type. A significant difference between the units in the number of channels, the LG S90QY has 5.1.3 versus 4.1 for the LG SLM4R. The output power is different and equal to 440 (overall) W for the S90QY versus 420 (overall) W for the SLM4R. Competitors do not have a built-in subwoofer. Rivals have wireless connection to separate subwoofer. The LG S90QY got our rating of 8 out of 10, and the LG SLM4R 7 for its audio features and specs.
Spotify support is available on the S90QY.
Only the LG S90QY can connect to the Internet via WI-FI. Rivals from our review have Bluetooth support. Only the S90QY supports HDMI Audio Return Channel (ARC). Both soundbars have a USB connector. For connectivity, the S90QY received a rating of 8/10 versus 6/10, respectively.
App control is available for the SLM4R. None of the models under consideration have a built-in microphone. Soundbars do not have Multi-room support.
Only the S90QY has a Dolby Atmos multichannel audio format support. A surround technology DTS:X is supported only by the S90QY. For multichannel surround LG S90QY got a rating of 10, and LG SLM4R 5 out of 10.