The doctrine of stare decisis is the doctrine of precedent. The idea behind it is that judges should make consistent decisions on cases that share the same or similar facts. This is to make sure that the justice system provides consistent, predictable results. It is particularly important in common-law systems such as the US and the English system.
In this case, Daphne v. Even Steven Auto Deals Inc. is likely to yield a similar result as Benny v. City Car Dealership.