It is copying ES very well but in principe it is les spiky.
I am in Europe, I am trading it out of ES RTH when it moves usually more than ES.
Ok, it has some independency but in principe it is like younger, not so dangerous twin brother of ES.
They are synchronised, so they always move in same direction, just the tick number can be different /often nearly identical/.
It has more bang per tick because it is 10 Euro.