i think none of them are gonna give you a good grip if ur shoes are wet. aluminum can be as slippery as ruber, even with holes, it wont grip. maybe put a towl on the pedal you like or on ur foot? or maybe put a pedal in a sock and have ur feet as dry as you can. more grip on cloth then rubber or aluminum
There's a raised lip on all of the "holes" to give good grip, even when your shoes are wet. It's not like a flat sheet of metal.