Finishing order prediction
A predicted classification for the whole field, from first to last, rather than a tip for the winner.
For every race RaceModel outputs an expected finishing position for each driver or rider, then sorts the field by it. That is the predicted finishing order. Scoring it means comparing every predicted position with every actual position, not just checking whether the winner was right.
Predicting the whole order is a harder task than picking a winner and is why RaceModel reports average position error rather than a win rate.