It's not all about taste though. Why are you happy buying into a method that treats the animals in such a poor way? You might not be able to tell the difference between the two, but there really is. Free range just tastes better, and surely the extra £ or two to ensure you're buying from a more friendly and responsible farming method is worth it too? I just don't understand how you can be happy paying such a pittance for what is essentially a hen crammed into a cage churning out eggs all day everyday with no movement whatsoever. It just isn't right.
I'm no animal rights activist but I do believe in buying good quality meat and eggs sourced in a manner that is respectful of the animals providing it. It just seems like the right thing to do.
By the way, crack open a caged hen's egg into a bowl, and then crack open a Burford Brown egg and see if you can tell the difference. You'd be surprised at just how noticeable it is.
Aren't you just comparing different chicken breeds there though? Nothing to do with the conditions they are kept.