Lidl, Aldi and Trader Joes are all German grocery chains. The Germans seem to have cracked the grocery formula like no other grocery stores in the world.
I think you’re right. As I understand it, Aldi and Trader Joe’s grew out of the same family, and Lidl isn’t connected with them.
I haven’t been to the Trader Joe’s here; but we like the feeling and experience of a smaller, easier to navigate store.
It’s not the only store we shop in, because there are things we use routinely that Lidl doesn’t have. But it’s impressed us enough that we go there a couple of times per month.