on a 333m you only have to navigate 2 turns, and you get to sit before entering turn 3.. on a 250m track you need to sit while you are in turn 1- there seams to be an immediate power drop while sitting, (especially during a turn) despite the fact that top speed happens a bit later.. then you typically have a power burst on the back straight before you to enter turn 3/4 at high speed- but likely not being able to hold max power through the tight turn….
on a 333m you get to sit before entering the turn, ride through a much gentler turn, and i think it allows that second burst of power and speed to be more easily maintained.. =Negative Split
check this data from a flying 200 on a 250m track:
notice that power drops around the sit (the timed section is shaded) then speed peaks after(71kph)…
there is a peak in power on the back straight resulting in nearly peak speed being reached again as turn 3 is entered (70kph- probably peaked at the apex), but the power can't be held through the tight turn..
a small burst of power at the exit of turn 4 to fight off the inevitable slowing..
i think the speed graph would look more like an "Arc" and less like an "M" on a 333m..???