[DiogenesKynikos]

There's a very well known engine tournament called TCEC. For that tournament, all the engines run on the same hardware.

The teams submit their binaries to the organizers beforehand, and the organizers run them on the tournament hardware.

There are some questions beforehand about what hardware to use (for example, some engines use GPUs and others don't), but after that is settled, the tournament is run in a fair way, hardware-wise.