UniqueItems is supposed to give quite a lot of output:
If your input would be: a,a,a,b,c,c,d,e,f,f,g,g
Your input would be a,b,c,d,e,f,g
Uniqueitems simply removes the duplicates.
With the SetDifference node it’s already only looking as if these were two unique item lists.
If the input into list 1 were to be a,a,b and the input into list 2 were just a, the output would just be b and not a, b. Next to that. It looks t the things that are in list 1 and aren’t in list 2, not the other way around. so if you were to put a,b into list 1 and a,c into list 2 the output would just be b.
To explain, could you give an example of what kind of inputs you’d give and what kind of outputs you’d want out of that.