Bonnell spring mattresses provide consistent firm support throughout the bed, ideal for those who prefer a bouncy and firm sleeping surface, while pocket spring mattresses offer personalized support by conforming to the shape of your body, providing better pressure relief and motion isolation. Bonnell springs are firmer and more durable, suitable for heavy sleepers, whereas pocket springs are slightly softer and offer targeted pressure relief, making them great for people with back and muscle pains. Ultimately, the choice between Bonnell and Pocket Spring Mattresses comes down to personal preference.