Vizio V Series V51-H6 vs Vizio SV510X-0806

The Vizio V Series V51-H6 is an older soundbar compared to the 2024 Vizio SV510X-0806. While there's not much to split the two when it comes to performance, the newer model has some bells and whistles that edge it ahead. A major difference is the inclusion of Atmos support in the 2024 model, which is a welcome addition at a low price point. The older model also lacks DTS:X support and has a slightly worse surrounds performance. That said, the V Series has a more balanced frequency response out-of-the-box and a better dynamics performance, as well as optical support.