For a given bitrate though say on Netflix the top one is around 15Mbps (but even if Apple at 30Mbps) so long as your WiFi can keep up and that includes the contention from other devices, then the PQ is not going to differ between wired and wireless connection.
Ive got a 55 , and cannot watch a movie ( or the ladies in the house watch greys anatomy etc. ) without the ethernet locking to 1.2 kbps .... yup , thats kilobits ..... seems to be the nature of the bug.
The TV buffers , and disney plus goes to a fireworks display.
A reboot of the TV fixes it temporarily.
So it was either take a potshot with a USB to gigabit network adaptor and see if it works,
( No one seems to know for definite which ones work ), or get an access point.
The Main Router is in the Office where the Missus works from home ( 250 mbps ) and is untouchable on pain of death, and down at the TV where the ladies tend to gather with their chat groups open ready to discuss the dramas as they unfold on the TV , the speed can drop to as low as 6-8 mbps.
Tested with speedtest on the TVs browser.
The Netgear WAC124 exceeds the network specs of the TV and is cheap , and after setup , with only the TV able to connect to it , we have 200+ mbps to the TV , so works a charm.
That's my solution and I don't get bothered by the ladies whilst they are watching, so fine by me.