Which major is harder, nutrition (nutritionist) or dietetics (dietitian)?

I'm transfering to Indiana University and am switching my major. I want to be either a nutritionist or a dietitian. I need to know if anyone knows specifically if IU is a hard school for those majors and which major is harder. I was thinking of majoring in dietetics and minoring in nutrition but I want to know what I'm getting myself into before I make a decision.