What is the difference between R5 and Rally2?

Can you elaborate on the distinction between R5 and Rally2? I'm particularly interested in understanding the key differences in terms of their functionalities, use cases, and potential benefits for users and investors. Is there a specific area where one platform excels over the other, or are they comparable in certain aspects? Additionally, how do they compare in terms of market adoption, user experience, and overall ecosystem development? I'm looking forward to gaining a deeper insight into these two platforms.