Sound leakage is high on both as they are both open back headphones, but the sundara's is 100%. It's a planar magnetic, the back side of the headphone produces the same sound as the inside of the headphone as the driver is flat vs. a dynamic driver is a cone shape.
The 560s wins over the Sundara in terms of comfort, gaming, and tonality.
The Sundara wins over the 560s in terms of sound stage, precision, detail, resolution, and clarity.
I think the reason I'm having such a tough time choosing one is they are both quite different.
Thank you!
How about the question on volume performance? Which one sound fuller/better at low/medium listening?