The Speed Figures used as an example in the original post at the top of this thread (80 vs. 73) aren't suggesting Horse A ran 10% faster than Horse B.
Most Speed Figures have a points per beaten length component.
Typically, the number of points per beaten length decreases as race distance increases (because horses decelerate as distance increases.)
For example, at the
Brisnet site:
Quote:
HOW MANY SPEED POINTS REPRESENT ONE LENGTH?
The Brisnet Speed Ratings points-per-length scale is based on the long accepted premise that as distances increase the value of a length decreases. On the Brisnet Speed Ratings scale one length is approximately equal to 1 1/2 points in sprints and approximately 1 point in routes.
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No two figure makers use the same exact methodology. Each set of Speed Figures (Beyer, Brisnet, Equibase, HDW, Ragozin, TimeformUS, etc. can have a slightly different take on both the definition of a "length" and the resulting points per beaten length component.
-jp
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