Both TVs provide standard built-in audio performance suitable for regular usage, though external speakers can enhance the experience. Samsung UA46F5100AR and Samsung UA48J5100ARLXL are well-equipped smart TVs that aim to provide a balance of picture quality, performance, and smart capabilities. Samsung UA46F5100AR features a 46 Inch (117 cm) screen while Samsung UA48J5100ARLXL comes with 48 Inch (121.92 cm), which can make a noticeable difference depending on your room size and viewing distance. Overall, both models are capable choices in their segment, offering a balance between performance, features, and usability. Both TVs provide decent motion handling, making them suitable for everyday viewing including sports and action content. Both TVs offer adequate brightness levels suitable for most indoor lighting conditions. Both models support 1920 x 1080 resolution, ensuring sharp picture quality with detailed visuals for movies, shows, and gaming. Both TVs come with smart platforms that support popular streaming apps and voice control features.

Verdict: Both models offer good value, and the better option depends on your specific requirements and viewing preferences.