You see the same order of magnitude differences between encoding 8-bit H265 on the 2020 imac vs 2019 imac. The T2 in the 2020 imac has hardware encoding ability

You see the same order of magnitude differences between encoding 8-bit H265 on the 2020 imac vs 2019 imac. The T2 in the 2020 imac has hardware encoding ability for 8-bit H265. Now, the thing is: intel's AVX512 instructions are supposed to accelerate this sort of work, but in practice they are getting lapped by the T2 chip. That signals that apple's ability to tune hardware designs to the needs of content creators is greater than intel's.