As far as taste different can not be for sure, but if you are feeding CC I think it helps them keep from getting an off taste from eating something else. Or at least the ones that I have caught from my ponds do not seem to taste as strong as ones I catch from lakes.
I will have to say that they add oil to the meat though. Once I clean my fish and place them in the water bowl a sheen of oil comes to the top that I have not noticed before feeding.
