• Less fat: Grass-fed meat has about the same amount of fat as skinless chicken or wild deer or elk. (See a comparison of fats in various meats)
  
• Lowers cholesterol: When meat is this lean, it actually lowers your LDL cholesterol levels.
• Fewer Calories: Leaner meat is also lower in calories
• More Omega 3: Although grass-fed meat is low in "bad" fat, it gives you from two to six times more of a type of "good" fat called "omega-3 fatty acids. (Benefits of Omega-3)
  Omega-3 fatty acids play a vital role in every cell and system in your body. For example, of all the fats, they are the most "heart friendly." People who have ample amounts of omega-3s in their diet are less likely to have high blood pressure or an irregular heartbeat. Remarkably, they are 50 percent less likely to have a serious heart attack.
  
  Omega-3s are essential for your brain as well. People with a diet rich in omega-3s are less likely to be afflicted with depression, schizophrenia, attention deficit disorder (hyperactivity), or Alzheimer's disease.
  
  Omega-3s may reduce your risk of cancer. The reason that grassfed animals have more omega-3s than grainfed animals is that omega-3s are formed in the chloroplasts of green leaves of plants. Sixty percent of the fat content of grass is a type of omega-3 fatty acid called alpha-linolenic or LNA.
  
  Switching to grassfed animal products is one way to restore Omega-3s to your diet. .
• The CLA Bonus: The meat and milk from grass-fed ruminants are the richest known source of another type of good fat called "conjugated linoleic acid" or CLA.  When ruminants are raised on fresh pasture alone, their milk and meat contain as much as five times more CLA than products from animals fed conventional diets.–12. CLA is believed to be a powerful defense against cancer.
• Vitamin E: The meat from grass-fed animals is higher in vitamin E. In humans, vitamin E is linked with a lower risk of heart disease and cancer.  This potent antioxidant may also have anti-aging properties. (See a comparison of Vit-K content in grass-fed versus grain-fed beef)
  
• Vitamin K2: Vitamin K2 is essential for healthy teeth and can be found most in the meat and dairy from ruminant animals. Humans are capable of converting only a small percentage of vitamin K1 into K2, while cows can convert  K1 from grass much more efficiently into vitamin K2 making grass-fed animal products an important part of our diet.

• Increased moisture content
• Decreased total lipid content by 43%
• 288% greater vitamin E content
• 54% greater b-carotene content
• Twice as much riboflavin
• Three times as much thiamin
• 30% more calcium
• 5% more magnesium
• Roughly the same amount of omega-6 PUFA
• Three times the omega-3 PUFA

Most of the above data is from the book Why Grassfed Is Best! The Surprising Benefits of Grassfed Meats, Eggs, and Dairy Products by best selling author, Jo Robinson. Other data comes from the website eatwild.com

You can visit NY Times best selling author  Jo Robinson's website to obtain extensive information on grassfed meat.