Actually no clue tbh.
I think it's all down to what your laundry habits are like, what your laundry setup would be like etc.
For example, while the LGs score not that much worse in terms of wash results vs ELux to the point that I don't think that I personally would know the difference in day to day washing, I do believe that some people would love to have a decent number of loads to be done about 10-15min quicker in the washer.
So if you focus on speed, the LG will be the winner.
If you don't mind the slightly longer cycles, the ELux will clean the crap out of the LG probably in those situations where you really need it.
No pretreatment, nothing.
If you buy a matched set, the ELux dryers consistently score better than the LGs.
Better drying performance, lower temperatures, better sensing system.
I personally find my 45dB DW to not be really that quiet.
For me the DC pumps are a really nice thing.
Would my washer be sitting in the basement or a laundry closet away from most living areas, the occasional more pronounced hum wouldn't be a matter.
Cycles wise the ELux is more compact and therefore allows more option flexibility.
For example Sanitize is available on a couple more cycles.
The Solid soil option could make sense if you live in an rural muddy area and are more outdoorsy.
The LG has more cycles, but less customizability there.
On the dryer side the LG has more preset sensor cycles, but if I'm not mistaken you can't alter the drying temperature on most of them.
The ELux has less cycles, but you can change temperature on them more widely.
And then there is price.
For me, a 3900 would have all the features I would want in an LG except maybe for TrueSteam (though not sure if any current LG still offers that).
For an ELux I would have to go TOL.
If I can get both for the same price as matched set that would make it hard.
If either is significantly cheaper, that would swing me that way.