Just an update. I decided to mount my Look Blades on one bike to compare with my 6700 pedals on another bike since I thought it would be an interesting experiment. The Look Blades are the 12 Nm version. With the tension on the Ultegra pedals dialed to the minimum, it felt like 13-14 Nm using the yellow SPD-SL cleats. But when using the red SPD-SL cleats without float, the perceived tension for me felt identical to the 12 Nm Look Blades with the gray Keo cleats. So if you already have 6700 pedals and want an "easier" release then I'd give the red cleats a shot, assuming you don't absolutely want/need the float.