Metrics weren't random but exactly those metrics that mattered for the users switching from IE to Chrome: speed, ram usage, battery usage.

Here's the first results on Google from a review on October 2023:

"Edge performs similar to Chrome in benchmarks, but has markedly lower RAM usage when you open some tabs. We're declaring Edge the winner in performance, which is quite a turnaround for Microsoft, the company that made Internet Explorer."

Source: https://www.androidauthority.com/chrome-vs-edge-3298624/