No studies demonstrated any nutrient benefit in adults. Surprisingly, risk for bacterial contamination w/Escherichia coli was the same regardless of production method. On the other hand, risk of antibiotic-resistant bacteria was lower in organic vs conventionally raised chicken & pork.
So does it really matter? Part of the problem is in the definition of organic , which is still tossed around rather loosely. Next, if the risk for contamination is same, does it matter if the risk for antibiotic-resistance is lower? Most important, what's the outcome benefit to you & me, especially if it costs more w/o any nutritional benefit? Obviously, that's a decision that you'll need to make, weighing benefit vs cost.