Poor little Graviton2 :-(Some pertinent points from the AnandTech article.
As mentioned already, Andrei seem to think the M1 TDP is somewhere a bit north of 20 Watts. That surprised me a little as I thought it would be below 20 Watts, but I'll defer to his expertise of course.
M1 gets full memory bandwidth with just a single core, at 58 GB/s read and 35 GB/s write. Bandwidth actually decreases somewhat as you add more cores.
Ryzen 5950X wins for Cinebench R23 ST performance. M1 and Intel Core 1165G7 are effectively tied for second place.
M1 wins at Geekbench 5 ST.
M1 wins at SPEC2006 ST, both for int and for fp.
Ryzen 5950X wins at SPECint2017, but M1 wins at SPECfp2017 ST.
Rosetta 2 performance ranges from 50-95% native according to SPEC2006 and SPEC2017 subtests, mostly in about the 70-80% range.
Hopefully he gets a huge shot of adrenaline at re:invent soon...