Delta and SPD are probably the two biggest names in the cycling shoe and pedal market. SPD cleats are for those looking for anything from recreational riding to commuting, and even spinning classes. Look Delta pedals are mostly used on the Peloton bike and can be often seen in the mountain biking or road biking community. There are both differences and similarities between these pedals. Unfortunately, they are not compatible with each other.
When I first started out biking, I first had to learn that one needed proper cycling shoes to ride. The more I investigated, these two names kept popping up. And while each offered their own special thing, I ultimately made my cycling cleat choice based on what I was looking for, which at the time was recreational training. Therefore, I got SPD cleats. As my riding evolved and turned more into a passion, I got some Delta cleats to ride road and mountain bikes as well as the Peloton bike.
Based on this experience, I´d like to share with you a Delta vs SPD comparison, in the hope it will help you sort out which one you want.