I'd like to see some quality blind tests on taste. Mostly we have anecdotes here.
As for nutrition:
http://theness.com/neurologicablog/i...-food-quality/
The most common justification I hear for the higher price of organic food is that they are more nutritious. This is perhaps the one aspect of organic food that has the most evidence available to judge. The simple fact is there is no advantage to organic food vs conventional food with regard to nutrition. One recent systematic review of published literature looking at nutrient content concluded: On the basis of a systematic review of studies of satisfactory quality, there is no evidence of a difference in nutrient quality between organically and conventionally produced foodstuffs. The small differences in nutrient content detected are biologically plausible and mostly relate to differences in production methods.
Another recent systematic review, looking at health effects (rather than nutrient content) concluded:From a systematic review of the currently available published literature, evidence is lacking for nutrition-related health effects that result from the consumption of organically produced foodstuffs.