There is no difference between those.
あまり違いはない.
There is no great difference.
I don't know the difference between those.
the differences are profound
はっきりした違いはない.
There's no appreciable difference.
I don't understand those differences.
I didn't know that difference.
There is no clear difference between those.
There are some points of difference between them.
Can you see the difference?
They are by different fathers―half-brothers―half-sisters.
I understood that difference.
Please tell me that difference.
Do you see any difference between the two?