Lance pedal question

[Climb01742]

does anyone know how the DA and Ultegra versions of shimano's SPD-SL pedals differ? i have four DA pairs and one Ultegra, and out on the road, the only difference i can tell is the ultegra model's float feels freer, easier, looser. which i like. all of my DA pedals float, sure, but not as freely. and yes, they're all adjusted to the same amount of release pressure. do i just have a "loosy goosy" pair of ultegra's or do all ultegra's float more easily? i used to ride speedplays, so free-floating float is, to me, a good thing. thanks.