Could you please elaborate on the comparison between Ripple and Ethereum? Could you possibly highlight the unique features of Ripple and explain how it differs from Ethereum? Could you also detail the benefits and potential use cases of Ethereum? Which platform would you recommend for long-term investment? Additionally, could you discuss the scalability and security aspects of both Ripple and Ethereum? Finally, could you provide your thoughts on the potential growth and future prospects of these two cryptocurrencies?