many pedals are excellent but the unifying factor of them all is ; they all have a flexible strap as a connector and a lift at the heel. leather or some other strong synthetic link allows for both rigidity and unparalleled smoothness in a pedal because that is where the connection is and that is where the slop and clatter occurs. pedals that have a steep slope to the heel ,pretty much force toemanship on the player . if there is a heel lift, it makes that optional and comfortable as a flat foot player, as well but maybe my ankles are abnormal.
most quality pedals have decent bearings, if they are kept lubricated and the springing need not be dual if there is overall rigidity and precision, although it is probably an asset.
Caroline, several Trixons , several Slingerlands, Tromsa K416.
I haven't checked on pedals developed in other parts of the universe ----the Ghost ( second design) is the closest I have of otherworldly types and I like it too. An older local Jazz drummer , who started playing the year I was born said Fred Gretsch gave him the first Ghost design( black), when Gretsch had Ghost and it was a better pedal than the ones I have , which are grey (I think Ludwig , then had it?) . It also has a flatter foot aspect to it , with a notable heel lift.