Unless you know the output of the fans, how can you say the ACTs are shite (unless of course your ACTs were recorded on the same rollers with the same fans )?

14°C difference between the Pace one and the Pro-alloy one is a significant real world improvement. As long as any further tests are carried out using the same rollers / fans, then all improvements made will be valid.

Comparing different rollers / fans is a waste of time and completely idiotic and it is impossible to make direct comparisons .