It could be the thinner tyre that makes the gap more pronounced. I'm just going by what I see. It looks fine with 18s and the thicker tyre on. I never thought, it needs lowering. It would look better lower, but it dont jump out at you. Then that 1st image with 19s rotas on non lowered car and every reply including the owner was 'it needs lowering' and it does.
I'm still confused
Even on my 18's I get comments from everyone - It needs lowering. A wheel size won't change the fact that it looks better lowered.
Your choice at the end of the day.