Not really mate, the 77GX, 77WX and the 77 AG9/AH9 will all have better binned 77” panels than the CX
Can you provide a source for this? I'm pretty much sure LG themselves said they don't do this.
Also historically panel variability between C, E, W ranges have all been very similar (aka there have been awful C, E and W panels with banding throughout the years
If this is just your own speculation or here-say.. then please present it as such. Otherwise some evidence and data would be nice.

If my next CX replacement is a duff, I'll have to get the GX
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Or maybe its god telling me to buy a JVC NX7 and ditch these tiny displays lol [/s].