"Who won? Who's next? YOU DECIDE!!!

Pekin Ducks are often mistaken for Geese. These two pictures summarize the visible differences but take note that there are many more differences:

Body shape and overall size - weight
Shape of the beaks
Posture, including legs, neck shape when upright
The walking step
The sounds (quacking and shriek)
Seasonal breeding
Egg size , nesting, incubation days
Going broody
Guard, defensive duties
Diet"