What is the difference between organic & non-organic milk?

Looking at buying Farmhouse Gold milk for the carnivore diet and I don’t know which one to buy. I’ve always been under the impression the un-homogenised creamy milk was the best. The ingredients on this one just say “Full cream milk” and that’s all. Until I saw the “organic” version that says “Made with wholesome milk from Australian fans free from synthetic fertilisers, pesticides and herbicides.” So what, does this mean the regular un-homogenised one is bad? Does it contain pesticides? Is the organic one better after all?

Thanks in advance