Both TVs come with smart platforms that support popular streaming apps and voice control features. From a practical standpoint, both options provide a reliable viewing experience for most users. Both TVs provide standard built-in audio performance suitable for regular usage, though external speakers can enhance the experience. Panasonic TH-43MX660DX and Samsung 43UE86AHULXL are two competitive smart TVs offering a mix of display performance, smart features, and overall value for different types of users. Both TVs come in similar screen sizes, making them suitable for comparable viewing setups and room environments. Both TVs provide decent motion handling, making them suitable for everyday viewing including sports and action content. Panasonic TH-43MX660DX and Samsung 43UE86AHULXL differ in resolution (4K vs 4K 3840 x 2160), which can affect overall clarity and sharpness of the display. Both TVs offer adequate brightness levels suitable for most indoor lighting conditions.

Verdict: Both TVs are strong contenders, and your final choice should depend on your preference for screen size, motion performance, and smart features.