As per the question is coinbase a safer wallet than blockchain
In my opinion the blockchain is best then anyone wallet because
blockchain is official wallet for the bitcoin .
What are you talking about? Blockchain.info is not and never was official bitcoin wallet.
You are probably confused by the name "Blockchain" and mixed it with bitcoin's blockchain, these are completely different things.
The closest wallet we can call an official Bitcoin Wallet is Bitcoin Core, originally developed by Satoshi himself.