Though there are many similarities between the two, the key difference between them is that Confucianism is an ethical and philosophical system, whereas Buddhism is a followed religion. Buddha and Confucius were Asian philosophers from the 6th century B.C, who sought ways to end the people’s sufferings all around the world.
The similarities are that both Obama and Bush focused on cleaner air, cleaner water and protecting important pieces of land important within America’s ecosystem. The differences I found was Bush was more oriented around conservation of natural resources and Obama was heavily focused on the issue of Climate Change.
The Magna Carta lead to the creation of the English Parliament, as well as the House of Commons and the House of Lords, if I recall correctly. Hope that helped.