the yubi is better you need the key and can not fake it (we hope)
ive had coinbase protected by yubikeys for years. so far so good. but afaik no one has ever tried to hack it either.
make sure you have at least two set up.. one as a backup if one is lost/dies. you can register several. not sure if coinbase has an upper limit as to how many you can register.
okay I have 2 yubi sticks but only did one.
I will look into doing the second stick right now.