No. The common base is the figures themselves. All the other variables are built into them.
If you were trying to compare Beyer figures-- which DON\'T take ground into account-- that would matter. In other words, if all the horses in one race were 5w and the ones in another were on the rail, and they both got 80\'s, the ones that were wide would be getting cheated.
We do the figures for each race separately (see \"Changing Track Speeds\" in the Archives on this site). As a rule days hold together, but that\'s just a happy circumstance. Each race is dealt with on its own, and the figures are based on the previous figures of the horses and the relationship between the horses after adjusting for beaten lengths, ground and weight.