There’s not really a huge difference between the two. At least not in comparison to the difference between a soundbar and an AV receiver. And, even though Dolby Atmos uses at least 7 channels, there’s not a lot of content out there right now that’s made for 7.2. It does allow for more speakers and more sound, so that’s a nice feature. But, it doesn’t really give you any better quality of sound. So it’s more about what you prefer and use.