The Irish would claim that their sausages are superior, as would the English and also the Scots, and then there is a thing called a Cumberland sausage wiich is an immense thing that sort of curls round in a circle (actually several circles) It's often served with Yorkshire Pudding if you know what that is. Oh and it has to be covered in a good brown gravy.
Haggis is Scottish. Basically traditionally a Sheep's stomach stuffed with chopped up heart, liver, and lungs, with onion and spices.
No doubt someone is going to correct me on this rather crude description but that's ok, I'm willing to learn.