1. Different resolutions

HDMI 1.4 is the commonly used interface cable at present, which can only transmit images at the highest resolution – 1080P.

With the universal use of 4K technology, the HDMI 2.0 has enhanced support for 4K UHD transmission with supporting to 3840×2160 resolution.
With the great enhancement in the support for 4K ultra high-definition transmission, it improves multiple video and audio technologies.

2. different frame rate and broadband

HDMI 1.4 video encoders interface can only reach a resolution of 3840×2160 and a frame rate of 30FPS at a bandwidth of 10.2Gbps.
The bandwidth of HDMI2.0 has been expanded to 18Gbps, which can support 3840×2160 resolution and 50FPS, 60FPS frame rate.
In fact, HDMI 1.4 version can already support 4K, but it is subject to the 10.2Gbps bandwidth.

3. Differences in color saturation

The HDMI cable of HDMI 1.4 interface only supports 8bit color depth.
The HDMI 2.0 video encoder interface of the HDMI cable supports a 10-bit color depth. Interface 2.0 has a better color hierarchy than interface 1.4 with a more delicate picture.