Just done some googling and found the following site:

Chicken:
http://www.calorieking.com/foods/foo...=68275&partner=#

Turkey:
http://www.calorieking.com/foods/cal...10dXJrZXk.html

That says that turkey has more protein although lots of fat and twice the calories.. I guess the fat content is the reason chicken is more popular? Although when bulking turkey looks ideal.