Hi Dennis.
Both horses came up at the same Odds because they did.
The Total for all runners in a Race must tally 100%, and if some of the animals are very poor conveyances, then they get rated very poorly.
So even in a Maiden Race, sometimes a poor Quality and inconsistent animal is SO Mush less poorer than the others, it is still coming up as a short Price.

If that don't help how about this.
One of the races is running at Flemington on a good Track.
The other race is at ROSEHILL, where the Track is wet and muddy.

Is a $3 Chance worth investing more, less or the same as a $3 shot on a GOOD Track?