-The supply is fixed. There's no inflation.
-The current transaction cost for a standard transaction is just 0.00001 XRP.
-The transaction cost is not paid to any party: the XRP is irrevocably destroyed.
-Ripple consistently handles 1,500 transactions per second, 24x7, and can scale to handle the same throughput as Visa.
-Ripple Labs share is locked in 55 batches, only one batch can be unlocked per month. It would take them 5 years to unlock them all. This makes their incentives 100% aligned with XRP holders. Ripple Labs is always working on creating new partnerships and expanding XRP's marketshare.
-Ripple doesn't use proof-of-work anywhere which requires inflation and/or outrageous fees (like Bitcoin)
-Ripple is more decentralized than Bitcoin. With Bitcoin, you have no choice but to trust whoever purchased the most hashing power (currently it's a chinese company called Bitmain). With Ripple, you can run your own validator and setup your own trusted validators list. 10s of non related reputable public and private entities around the world are currently running validators (e.g., MIT, Microsoft, ..etc), many more keep joining.
-The software is open-source (Stellar was a fork of Ripple).