Hi
On this track discussion, I was on a UK forum site last year and the discussion referred to barrier draws. Each track and distance had a barrier draw bias. Some had inner barriers with a marked bias, others the middle or the outer. Such was the bias some trainers withdraw if they get a bad draw. They even posted the list with the degree of bias. The very next post highlighted the factor of slipstreaming and the effects prevailing winds and the position of the horse especially coming into the finish. All out of my league but may explain why there are differences in tracks.
Regards Beton