Okay, I was able to finish a Quick Research on each core area(mm2 on the die) and performance using Geekbench I will try to find info for power usage.
CPU 2021 benchmarks: Compare two products side-by-side or see a cascading list of product ratings along with our annotations.
www.anandtech.com
So these scores are for Performance per Area(square millimeter)
A single Apple Firestorm core is about 9 mm2 in size, they get about 1740 points on GB5, that puts them at 193 points per area.
A single Amd Zen3 core is about 6.5 mm2 in size, they get about 1500 points on GB5, that puts them at 230 points per area.
A single Intel Golden Cove core is 10.5 mm2 and they get abut 190 points on GB5, that gets them about 100 points per area.
Edit.
Also as I pointed out earlier, this is 1C/1T which puts the X86 CPUs on a disadvantage when compared to a 1C/1T Apple Firestorm. so add about 30% performance per core since the HT/SMT is already built on the Core