Never heard about raaven before but Cartesi is well known on this forum and outside this forum, it's a good DeFi project just like few others, I don't like recommending DeFi projects to people because they are even more risky than other, also I will like to advice you not to invest in a DeFi project because people recommend them to you, you got to do your own research, here are other few I like, Paid Network, DIA, Polkadot and Avalanche