I'm no guru about pedals...just sharing my experience with the awesome features of a Pearl Eliminator Pedal.
the good thing in elims is that with its adjustable features, the pedal itself adapts to the drummer's style of playing. the responses from the different cams are definitely faster compared to the typical pedals we used way back.
with my playing style, i enjoy most the red cams because of its sensitivity and quick attack response. I used to have a single pedal in which there i was using the belt drive. The difference from the belt i used before and the chain drive i have with my double pedal now, is that belt drives offer more "fluid" feel, faster in a way because it is smoother, and with the chain drive, i find it much quicker and more responsive. i can say that because i tried using both drives with the same settings.
the pedal's height can be adjusted for your foot style...mapa-heel up, heel down, and so on...
the height from the beaters are also adjustable to add weight for attack.
foot plate can be changed to put traction...so does the rubbers, it can be removed, if you prefer a much smoother feeling nailing those "power slides".
using the elims is like a trial and error process...mahirap sa una at nakaka-frustrate but after all the hours,days or even months of "butingting", its all worth it...iba ang pakiramdam kapag comfortable ka at real-time ang response ng pedal mo.