The JBL Bar 9.1 is a better performing soundbar than the JBL Bar 5.1 Surround. The Bar 9.1 is a 5.1.4 setup with detachable wireless satellites and a more neutral and balanced sound profile. Its center and surround performances are much better too, and it supports Atmos as well as eARC. It also supports a wider array of audio formats over its physical inputs.