A closer look at both DisplayPort 1.4 spec, and the newly ratified HDMI 2.1 spec to see the difference between them.
Which Is Better: DisplayPort or HDMI? – iVANKY
DisplayPort 1.4 vs HDMI 2.1
DisplayPort 2.1 vs. HDMI 2.1: Which is Better for PC Gaming? — Acer Corner
DisplayPort 2.1 vs 1.4
HDMI 2.1 Vs. DisplayPort 1.4: Comparing Unknown Facts - uni
This adapter is the perfect solution to connect to any HDMI 4K120Hz 8K60HZ ready displays*. If you have a DisplayPort 1.4 ready PC or any other device
DisplayPort 1.4 to HDMI 2.1 HDR Active Adapter,Support 4k@120Hz,8K@60Hz,HDR,Uni-Directional Display Port 1.4 to HDMI 8K Converter,Support for
DisplayPort 1.4 vs HDMI 2.1
HDMI 2.1 vs. DisplayPort 2.0: An In-Depth Comparison
DisplayPort 1.4 to HDMI 2.1 Adapter 8K 60Hz 4K 144Hz - CABLETIME
HDMI 2.1 vs DisplayPort 1.4