On paper ?
a higher quality cable has better soldering, thicker wires which can support more bandwidth, a mash or metal film coating over the cable bundle to filter out external interference.
in reality ?
as long as its certified for the HDMI revision you want to use it for and your device is less then 5 meters from the TV, you´re wasting money getting anything else then the 10 buck cable as long as its certified for the HDMI version you need.
For longer distances you might need shielded cables.
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