Both Michelangelo and Leonardo were obsessed with the body, as were most artists during the renaissance.  Michelangelo was born in Caprese and when he was first starting to draw his father did not respect how much time he spent on drawing but he eventually recognized his talent and apprenticed him at the age of thirteen.  The man that he was being taught by died and Michelangelo was left out on his own at the young ago of seventeen.  He did most of his work for high paying royalty and sculpted only out of the finest materials.  Michelangelo was obsessed with the male body and was known for his accuracy and delicate markings of the page.  Michelangelo was such a perfectionists that when he was hired to paint the sistine chapel he fired all of his assistants and did not let anyone see it until it was completely finished.

Ceiling of the Sistine Chapel, Michelangelo

The Last Judgement, Michelangelo

Self Portrait, Michelangelo 

Leonardo was raised by his father in Italy up until he was about fifteen, at that age he was apprenticed to an artist in Florence. Unlike Michelangelo, he was not much of a sculptor and was by no means a perfectionists.  He did various sketches and inventions, many of which he never finished.  His true obsession was getting everything that he could think of down onto a piece of paper, most of what he painted is not still here today other than works preserved in a museum.  Most of what we still have today are from his note books, which were filled with his inventions. Most of his inventions were way ahead of his time 

The Last Supper, Da Vinci

Eight Barreled Machine Gun, Da Vinci

Mona Lisa, Da Vinci

Michelangelo was a artist and sculptor while Da Vinci was a artist and a scientist. They each had great masterpieces but Leonardo was more of a inventor and researcher than a artist. He put more time into trying to create new things and to see how things worked so he could improve them. Both were master painters but, Michelangelo was the dedicated artist while Leonardo was a scientific genius for his time.