In terms of market capitalization, XRP has beaten Ethereum. However, market cap tells nothing since Ethereum is more popular and actively supported than Ripple/XRP. XRP has only gone up in market cap, simply because of the recent bear market which have caused most cryptocurrencies (Ethereum included) to fall drastically in value. Right after the bear market ends, I believe that XRP would head back to its third position in market cap, while Ethereum will rise back as the second largest cryptocurrency by market cap.

If you're considering serious competitors against Ethereum, then looks no further as Cardano, EOS, and NEO are strong in development and innovation. They're smart contract platforms like Ethereum but with added speed and lower costs. Eventually, the market will decide which smart contract platform is the best according to mainstream adoption and popularity. Right now, Ethereum is still the leader of smart contracts, but everything could change in the future, if ETH doesn't adapt quickly for mainstream use.

Nonetheless, I believe that no competitor could match Ethereum in terms of development, popularity, and community support. Just my thoughts