The main difference between a hybrid and a driving iron is the clubhead design and the intended use of each club.
A hybrid club has a larger clubhead and a more rounded sole, which helps the club glide through the turf and prevent digging. This makes it easier to hit out of the rough or other challenging lies, and also helps to get the ball airborne quickly. The clubface is also typically more forgiving, which means it is easier to make solid contact even on off-center hits. Hybrids are often used as a replacement for long irons or fairway woods, and are especially useful for golfers who struggle to hit these clubs consistently.
A driving iron, on the other hand, has a smaller clubhead and a more compact shape, similar to a traditional iron. The clubface is typically less forgiving than a hybrid, but the smaller size and shape make it easier to control the ball flight and shape shots. Driving irons are often used by more experienced golfers who prefer the feel and control of a traditional iron, but still want the added forgiveness and distance of a utility club.
Overall, the main difference between a hybrid and a driving iron is the intended use and the type of golfer each club is designed for. Hybrids are more forgiving and designed for maximum distance and versatility, while driving irons are more precise and designed for golfers who prioritize control and shot shaping ability.