Looks like the whole tyre is worn more to me from those pictures -
Top one has distinct tread indents in the center bar and clearly defined tread in the one to the left of that. Bottom pic has no signs of tread on the center bar and the one to the left has feathering of the tread
It might just be the pictures that give this impression, a tyre gauge across both tyres would show and real difference - both tyres are towards the end of their life and I guess another mm of wear on the top tyre would make it look like the bottom
Did you fit two new tyres at the same time?
If your car is still lopsided I'd check the suspension carefully looking for broken springs and get it corner weighted