This is a demonstration of how powerful Apple’s current silicon is in absolute terms, and it also shows that it can run x86 code at more than adequate speed for many use cases.
I’d say not much, and not at all. Even if cooling is a factor the outcome still has the same meaning.
Apple silicon is way ahead, and emulation is excellent to the point of being a non-issue.
A devkit that can supply more watts of electricity and remove more watts of heat would definitely have an advantage.
A most fair comparison would require using the same type of case, power, and cooling for both CPUs.
But we can clearly see the order of magnitude, and it is quite obviously impressive in both of the ways already stated.
iPads are faster than Mac mini’s even with the same thermal differential.
The thermal issue does nothing to dismiss this truth.