Haven't seen Haller play since at West ham but yeah Haaland has the unique play style and movement
I followed and watched Haller nearly a year now and its the same for him as with Haaland , he also has unique playing style.
If you looking at the statistics he is at some points already a bit better as Haaland .
I guess we will see a very much diffrent and better Dortmund as we have seen last season.