The S517 series has been released all the way back in 2018 as affordable HDMI Smart TVs with a relatively high price point for all screen sizes. TCL 43S517 vs TCL 49S517 has a smaller screen, 43 inches versus 49 and 103 PPI vs 91.
Both of these TVs have a flat VA display with 1.07 billion colors. HDR10 technology is used for both of them. Also, both TVs have viewing angles of 178 both horizontally and vertically.
Neither has a 3D feature. But the array of playable file format is amazing: MKV, TS, AVI, WMV, and MP4. The amount of codecs is also great: DivX, H.264, H.263, and MPEG-4.
You have 16 W stereo speakers but no surrounding sound technology, no DTS, Dolby Atmos or Dolby Surround either. However, the series recognizes all existing audio file formats: MP3, WMA, WAV, AAC, AC3, and FLAC.
Both TVs are compatible with Alexa and Google Assistant. The connectivity options are USB, Component video input, Composite video input, VGA input, Optical digital audio output, analog audio output, Ethernet, Wi-Fi 5GHz and 3 HDMI inputs. There is no Bluetooth. You have a digital and an analog TV tuner.
You also have the parent control as well as all the known streaming services like Netflix, Hulu, HBO, and Amazon video. TCL 49S517 vs 43S517 has YouTube. But TCL 43S517 also has Vudu.
The TVs have an identical minimalistic matte metallic black design with legs stand. TCL 49S517 vs TCL 43S517 is 43x25 inches vs 37x22 inches. Compare the weight as well, 18 and 31 pounds. The weight with stand is 19 and 35 pounds respectively.
The TCL 49S517 is better TV in this comparison. Check TCL 49S517 price