As per the question is coinbase a safer wallet than blockchain
Way way back I started bitcoin using Coinbase wallet, then now Im using them for the ETH & Litcoin wallet too, PLUS coinbase' mobile app is a great help and I haven't experience any bad issue or problems using coinbase, very secured too!.
Quite opposite on what I experienced on their android app as its buggy to the point that it doesn't even let me copy my bitcoin address and yes it also freezes sometimes.
I wouldn't call it "secured" as it doesn't even give you your private key so technically you're not in fully control of your funds and is subjected on their policies where changes will be made in the future regardless of your opinion. There's also a bonus of slow support.