There is no one-size-fits-all answer to this question, as the taste of adzuki beans can vary depending on how they are prepared. However, in general, adzuki beans tend to have a sweeter, nuttier flavor than kidney beans. Additionally, adzuki beans are often used in desserts and sweet dishes, while kidney beans are more commonly used in savory dishes. So, if you're looking for a bean with a sweeter flavor profile, adzuki beans are a good option.