Fat is where many toxins accumulate. If the animal you eat has been fed with pesticide-ridden, fattening-rather-than-nutritious crap and pumped up with hormones and antibiotics, I bet its fat is not as good for you.
As an heuristic, taste is supposed to be a measure of nutritional quality. Sure it can be cheated, but when something natural tastes better than something adulterated, I'm pretty confident you can rely on that hint.
Two reasons why this comment might get downvoted (it was light grey when I saw it):
(1) Supplies your intuition about whether organic food is healthier than conventional but no facts to back that up. The world is usually counterintuitive.
(2) Suggests with a straight face that palatability is a good proxy for healthfulness, a measure that suggests health food stores should stock up on Doritos.
(1) having no facts to back the opposite assertion either, I'll take intuition as an heuristic.
(2) I explicitly noted the caveat that taste may be cheated. Now, taste was developed by evolution, and is cheated by the food industry, not (normally) nature. So I wouldn't trust taste of Doritos (artificial) over natural foods, but if I actually like vegetable soup better, I'm not going to look up what's the latest trend on nutrition to assume my choice is healthier.
As an heuristic, taste is supposed to be a measure of nutritional quality. Sure it can be cheated, but when something natural tastes better than something adulterated, I'm pretty confident you can rely on that hint.