The LG SN9YG is a better performing 5.1.2 soundbar than the LG SL10YG. While both soundbars feel well-built, the SN9YG has a slightly better-balanced sound profile and a better soundstage. Its center, surrounds, and height performance are also better too, it has more sound enhancement features including room correction, and supports eARC. However, the SL10YG has a better THD performance, and while both soundbars can get similarly loud, the SL10YG has fewer compression artifacts and thumping at max volume.