Comparison of Ripple with bitcoin is pointless because both are different Cryptocurrency. Bitcoin is most trusted and tested Cryptocurrency and known as father of all Cryptocurrency. Ripple has to tested, rather than direct competition with Bitcoin Ripple have to compete with Stellar Lumen which is more cheaper and faster than Ripple.
One of the biggest disadvantage of Ripple is , it is centralize Crypto which company can manipulate price for their own profit on the other hand it is not possible with bitcoin. Ripple is a over hyped Cryptocurrency, even though in the term of capability, cost of transaction it can not beat stellar Lumen.