Do Dolby Vision FEL discs really look better?

[eddievanhalen]

I recently got an LG OLED A1 (entry level) set 55 which I'm very happy with moreso coming from a Samsung (also entry level but more expensive that what I paid for myLG OLED set) 50'' 4K HDR set from 2017.
To match it with, I got Sony's X800 M2 that has Dolby Vision.
It may be the way my OLED set handles Dolby Vision (Cinema setting is way too dark, I use Home Cinema setting for Dolby Vision material), or how the Sony X800 M2 decodes Dolby Vision, or just Dolby Vision UHD BD's are meant to look dark.
But there's a difference between Dolby Vision UHD BD's, and those are FEL discs, the ones that feature a video layer extension that adds up to the compatible HDR10 stream.
UHD BD's like Gladiator, John Wick 3 or The Fog seem to look better, a bit better, than MEL Dolby Vision discs (the ones that have a plain HDR10 video stream plus just metadata for Tone Mapping on the TV set).
Am I being biased by the addition of FEL or not on Dolby Vision discs or for most of you FEL discs really show an increase on picture quality?