Thomson 50TM5090 and Insignia NS-49D420NA18 are well-equipped smart TVs that aim to provide a balance of picture quality, performance, and smart capabilities. Thomson 50TM5090 features a 50 Inch (126 cm) screen while Insignia NS-49D420NA18 comes with 49 Inch (124.46 cm), which can make a noticeable difference depending on your room size and viewing distance. In general, both TVs cater to modern entertainment needs, including streaming, gaming, and everyday viewing. Both models support 1920 x 1080 resolution, ensuring sharp picture quality with detailed visuals for movies, shows, and gaming. 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. Audio output differs between the two (24 W vs 2 X 7.5 W), which can influence overall sound clarity and loudness. 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.