THere you go with one of your broad sweeping statements again. I taste the difference. The skins of the fruit are the easiest, raw meat that has been factory farmed is basically unpalatable, and with eggs there is a visual difference along with a taste difference-they are usually a very light yellow if they are unsustainably farmed whereas a really healthy yolk should be a deep orange(I've even seen almost reddish yolks) and they are somewhat bitter if they are unhealthy. A healthy animal should be able to taste the difference too-after I cleaned up my cat's life he basically refused to eat any raw meat that wasn't organic or better.
You are not comparing the same seed or genetic line with differing farming methods. You are taking two wholly separate products and comparing them making your statement invalid.
You need to take the same seed and plant it in an organic field and a non-organic field. Pick them both at the same level of ripeness. It is impossible to tell the taste apart.
The same with cattle. Take a Hereford and its twin. One goes to pasture, one goes to CAFO. Feed them the same nutrient content. Both are slaughtered at the same peak. The steak on the table will taste the same.
The nutritent content and phytochemicals may be different, albeit EVER SO SLIGHTLY as genetics play more of a role, but taste will not be affected whatsoever.
With that said, I buy Sustainable and nothing else for many reasons. Taste is not one of them.