Battle of the Buns

Copyright ©2003 by  Paul Niquette. All rights reserved.

o distinguish its hamburgers, a certain fast-food chain came out with a curious innovation: the square patty.  It is depicted in the diagram (near right) with juicy corners sticking out of the traditional round bun.

Not to be out-done, a competitor began offering a distinctive square bun, with its traditional round patty sticking out as shown in the diagram (far right). 

Both products contain the same amount of hamburger meat.

Which bun is bigger?