> Huh, interesting! I wonder where the discrepancy comes from.

Probably because the Cloudflare data is percentage of traffic (e.g. total requests), and the Google data is percentage of users. Mobile traffic is more likely to be IPv6, and that would skew the numbers.

Yeah, cloudflare sees a lot of backend systems too (servers); whereas Google probably gets more from (and is reporting on) devices attached to humans.