Google's implementation is carrier vetoable, since it's on the SIM. Additionally, Google's implementation requires the transaction transit their infrastructure

Google's implementation is carrier vetoable, since it's on the SIM. Additionally, Google's implementation requires the transaction transit their infrastructure, Apple's does not. They don't even know the transaction occurred. Yes, they're not technically first, but the two systems are not identical. Personally, the less a large corporation knows about me, the better.