Out of all the big tech companies google is at least honest. They clearly state what they collect, how they collect it and you can delete it.
Apple promises too much, delivers too less.
But
Apple pay gives tokenized card data to merchants for payments.
Google Pay does not.
Google has to verify identity to comply with the authorities, the fact they are promoting zero knowledge tech for this is a HUGE precedent for the industry of identity verification.
If I have to use a wallet/payment app, I will go with apple pay on an apple watch.