You disagree, but why?
Compute is compute. Both providers offer similar instance classes for the most part. GCP offers sustained-use discounts, in addition to committed use discounts that match up to reserve instances, plus billing by the minute.
Spot instances can be hugely variable, but cheaper than prremptible. Preemptible offers predictable costs with a guarantee that the instance will go away every 24 hours (and come back).
Network IO is way better.
Inter-region networking comes for free.
GCP ssd persistent disk lands between AWS GP2 and IO1 and gives way more predictable performance.
Local disks can be attached to any instance and end up giving similar performance and being way cheaper than I2 and I3 instances.