Answer:
What is the difference between a poorly dressed man on a bike, and a well-dressed man on a unicycle?
I am known for my natural tuxedo and marching
I look at you you look at me I raise my right you raise your left.
I am the noblest musical instrument
I have three eyes and only one leg. Obey me or you will be sorry.
Those with eyes bigger than their stomach will definitely leave the restaurant with one of them. It is named after a house pet as well.