Hi cjadams,
yes the test it definitely not esaustive, it is just to have a rough idea of the performance.
To have the real picture, we need to wait for 2021.1 stable SDK with proper Octanebench supporting both CUDA and Metal GPUs at the same time.
Also, I think that currently the M1 test has been done under Rosetta 2, so still to early to judge the new Apple Silicon GPUs in action.
Happy Mac GPU rendering,
ciao Beppe