It's entirely possible they installed Android on the Intel platform. Unlikely, but possible.

I had an Intel x86 Android phone from Asus a while ago, complete with Intel Inside logo on the back case. Not sure if they still sell x86 phones these days though.

https://www.gsmarena.com/asus_zenfone_2_ze551ml-6917.php

I assume the tests are same regardless of platform.

They aren't, though. Compare windows vs. linux geekbench scores of identical hardware, they are extremely different:

Linux: https://browser.geekbench.com/v5/cpu/2638097 Windows: https://browser.geekbench.com/v5/cpu/2635048

Geekbench is a terrible benchmark.

You cherry picked a terrible example. Here are some more Windows examples with the same chip: https://browser.geekbench.com/v5/cpu/2628613 https://browser.geekbench.com/v5/cpu/2628613

In my own personal experience, running Geekbench on many machines, Geekbench scores are pretty close running between Windows and Linux on the same machine. At least for compiling code (my main use for powerful machines), their compilation benchmark numbers also fairly closely match compilation times I observe.

Your links are identical.