Current distribution plot analysis?
Since you're using DC Conduction you have no varying field effects (like skin and proximity effects) and have linear material (copper). Whatever excitation current value you're using the current distribution doesn't change qualitatively, but only the quantity of current will be scaled.
The J will be the highest closer to the center of the whole thing. You're seeing slight difference when applying higher current due to having manual range of current values, that is why there are so many blue arrows. :)
Click twice on scale and change it to auto.

Also you can visualize magnitude of J on the whole thing.