my chrono tests on a dozen or so makes and models concluded
cheap = inconsistent speed
expensive = more consistent speed
on the day fiochi black, blue and golden summat were the most consistent, however that was three years ago. This was a pretty scientific test with recorded data (on the day) we also had a friend who is a ballistics guru rip them apart and analyze the powder and even did a drop test for antimony and consistency of stated antimony. Again a scientific test. He concluded expensive is better as far as quality and consistency of components .
I can not elaborate any further, people are free to shoot cheap if they cant tell any difference, people are free to shoot expensive if they can tell or more importantly if they are very serious about a team place and want one less thing to doubt .