Very very very similar performance. I would say bass sounds a little "drier" (for lack of a better term) with the 970/7075 combo....bass sounded a little "thicker" with the 1070 (maybe due to the shared large capacitance?). Sounds in movies seem a little crisper in each speaker with the 970/7075. For example I was trying out private ryan (dts) and background voices really popped out in a way that I don't ever remember before.