Difference between butter and olive oil? Generally when I cook I use extra virgin olive oil for both meat and vegetables. While watching a cooking show they mentioned using butter instead of oil to grease the pan when they were cooking steak. 

What is the end result different between using butter rather than olive oil and does it after vegetables and meat?
The only reason to use butter instead of olive oil would be for the butter flavor. In restaurant cooking the steak is finished off with butter for flavor. If you do cook with butter you need to remember butter has a much lower burn point than olive oil.