extending EntityQuery by override or by constructor ?

[codelion]

I've seen both kind of code:

public class PotatoQuery extends EntityQuery {

public PotatoQuery() {
 setEjbql("SELECT potato FROM Potato potato");
}

as well as

@Override
public String getEjbql() {
 return "SELECT potato FROM Potato potato";
}

Are both equally valid? Fyi, override example is from recent seam-gen.

Now it seems e.g. for setOrder one would want to use the constructor, because it may change.