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.
Seconded, I have experienced it too on their mobile app which it do really have some bugs which you can even copy your address or even does show some visual glitch for sometime when you are trying to scroll between other accounts.They do have support but its automated and not all issues and questions can really be precisely be answered by that bot.