What is ravencoin (RVN) in Bitcoin (BTC)?

Could you elaborate on the relationship between Ravencoin (RVN) and Bitcoin (BTC)? Specifically, how does Ravencoin position itself in the cryptocurrency landscape with respect to Bitcoin? Is Ravencoin a fork of Bitcoin? What are the key differences in their functionalities, use cases, and underlying technologies? Additionally, how does the value of Ravencoin compare to Bitcoin, and what factors influence their respective market prices? Understanding these aspects would help me gain a clearer perspective on Ravencoin's significance and its place in the crypto ecosystem.