Comparison between TCL 55X4US vs TCL 55EC780

General Info
Model Number	TCL 55X4US	TCL 55EC780

Price	Check on Amazon	Check on Amazon
Type	TV	TV
Year	2018	2019
Brand	TCL	TCL
Model Series	X4	EC78
Model Number	55X4US	55EC780
Alias		55EC780X1
Display
Screen Size Class	55" (inches)	55" (inches)
Diagonal Size	54.65 in 138.8 cm 1388 mm 4.55 ft	54.65 in 138.8 cm 1388 mm 4.55 ft
Screen Width	47.62 in 121 cm 1209.6 mm 3.97 ft	47.62 in 121 cm 1209.6 mm 3.97 ft
Screen Height	26.79 in 68 cm 680.4 mm 2.23 ft	26.79 in 68 cm 680.4 mm 2.23 ft
Display Manufacturer	Samsung
Display Type	VA	VA
Display Bit Depth	10 bits	10 bits
Frame Rate Control	No	No
Max Number of Colors	1073741824	1073741824
Bits	30	30
Screen Aspect Ratio	16:9	16:9
Screen Resolution	3840 x 2160	3840 x 2160
Screen Pixel Pitch	0.315 mm	0.315 mm
Screen Pixel Density	80 ppi	80 ppi
Screen-to-Body Ratio	88.2 %	90.77 %
Backlight Source	Direct LED (Full-Array Local Dimming)	Edge LED
Screen Brightness		400 cd/m²
Static Screen Contrast	4000 : 1
Screen Horizontal Viewing Angle	178 °	178 °
Screen Vertical Viewing Angle	178 °	178 °
Display Minimum Response Time	6 ms
Display Coating	Glossy
HDR	HDR10 HDR Premium 800	HDR10+ HDR Pro Dolby Vision
3D	No	No
Size, weight, color
Case Depth	1.74 in 4.4 cm 44.1 mm 0.14 ft	3.07 in 7.8 cm 78 mm 0.26 ft
Case Weight	16 kg 35 lbs	12.2 kg 27 lbs
Case Width with Stand	48.46 in 123.1 cm 1231 mm 4.04 ft	48.9 in 124.2 cm 1242 mm 4.07 ft
Case Height with Stand	31.3 in 79.5 cm 795 mm 2.61 ft	30.75 in 78.1 cm 781 mm 2.56 ft
Case Depth with Stand	8.01 in 20.3 cm 203.4 mm 0.67 ft	8.66 in 22 cm 220 mm 0.72 ft
Case Weight with Stand	16.5 kg 36 lbs	12.4 kg 27 lbs
Case Color	Black, Silver	Black
Hardware
CPU Cores	4
GPU	ARM Mali-T860 MP2
GPU Cores	2
RAM Memory Size	2.5
Internal Storage	16
TV Tuner		Analog (NTSC/PAL/SECAM) DVB-T DVB-T2 DVB-C DVB-S DVB-S2
Built-in Camera	No	No
Network	LAN Wi-Fi 802.11a (IEEE 802.11a-1999) 802.11b (IEEE 802.11b-1999) 802.11g (IEEE 802.11g-2003) 802.11n (IEEE 802.11n-2009) 802.11n 5GHz Bluetooth Wi-Fi Direct	Wi-Fi 802.11b (IEEE 802.11b-1999) 802.11g (IEEE 802.11g-2003) 802.11n (IEEE 802.11n-2009) 802.11n 5GHz Wi-Fi Direct DLNA 1.5
Connectivity	1 x Ethernet RJ45 2 x HDMI 2.0 1 x AV Composite In 3.5 mm jack 1 x 3.5 mm Audio Out 1 x S/PDIF 1 x HDMI 2.0 (ARC) 1 x USB 2.0 1 x Antenna (RF) 1 x USB 3.0 (5V/0.9A)	2 x HDMI 2.0 (b; HDCP 2.2) 1 x HDMI 2.0 (b; HDCP 2.2; MHL; ARC) 1 x RCA Video In 1 x 3.5 mm Audio Out 1 x Optical Audio Out 1 x Satellite In 2 x USB 2.0 1 x Antenna (RF) 1 x Ethernet RJ45 1 x CI+ 1.4
Audio
Audio Speakers	2 x 10W	4 x 13W
Features
OS	Android 7.0 Nougat	Android 9.0 Pie
Cool Features	Quantum Dot Color HDCP (High-bandwidth Digital Content Protection) 2.2 Wide Colour Gamut	HDCP (High-bandwidth Digital Content Protection) 2.2 Picture noise reduction Wide Color Gamut Game mode / Film Mode / Sports mode Google Assistant
Extra Features		Remote control - RC602S6+RC802N6
Ergonomics
Case Width	48.46 in 123.1 cm 1231 mm 4.04 ft	48.9 in 124.2 cm 1242 mm 4.07 ft
Case Height	29.84 in 75.8 cm 758 mm 2.49 ft	28.74 in 73 cm 730 mm 2.4 ft
Vesa Mount Support	Yes	Yes
VESA Interface Standard Size	500x200	200 x 200
Removable VESA Stand	Yes	Yes
Height Adjustment	No	No
Landscape or Portrait Pivot Support	No	No
Left or Right Swivel Support	No	No
Forward and Backward Tilt Support	No	No
Frequency and Interpolation
Vertical Digital Frequency	60 Hz	60 Hz
Screen Interpolation Technology		Picture Performance Index
Screen Interpolation Value		2000
Screen Interpolation Measurement Unit		PPI
Accessories
Extras	Basic Remote (RC802N) + Smart Remote (RC602S)
Certificates and Standards
Usage and Storage Requirements
Safe Operating Temperature Level	5 °C - 35 °C 41 °F - 95 °F	5 °C - 35 °C 41 °F - 95 °F
Safe Operating Humidity Level	20 % - 80 %	20 % - 25 %
Internal Storage Temperature	-15 °C - 45 °C 5 °F - 113 °F	-15 °C - 45 °C 5 °F - 113 °F
Internal Storage Humidity	10 % - 90 %	10 % - 90 %

TCL 55X4US

TCL 55EC780