Ground turkey can be rather high in fat and calories. I was about to buy my usual 96/4 ground beef to make chili, but decided instead to try to shave some calories by making turkey chili. I'm glad I read the label--the turkey was way higher in calories! The ground turkey was 85/15--that's a lot of extra fat. I did find a company that had 96/4 white meat only ground turkey--and the calories were the same as my ground beef, 140 cals. per 4 oz. serving, so I decided to stick with the beef.
Unless you have a thing against red meat or just prefer the taste of turkey chili, there's no real calorie advantage to the turkey--the important thing is reading the label and checking the lean/fat ratio.