Don't worry about little taste differences. I just cook them and eat them. (I do see a difference between fish like trout, salmon, catfish, walleye/perch, striped bass, etc. and I may fix each a little differently.) I do notice a difference in taste of wild-caught catfish and what you get in a resturant. Definately like wild-caught over farm-raised (my apologies to the fish farmers out there.) Just like there is a difference between wild an dtame turkeys, pigs raised in big barns and on the ground, chickens etc.
Sorry about the rant.
Eat fish and live well.