Maybe you should read the post more carefully.
I said they were negligable _UNLESS_ you compare them side by side. If you looked at the ATI shot in one shop, then walked into another shop showing the NV one, I doubt you'd remember any difference.
But on close comparisons, I said the NV looks like it has better texture detail.
I'm just saying most ppl wont be bothered by a small detail as lighting change. Hell you could even disable lighting alltogether, and most ppl wouldn't even notice unless you slapped them with an ATI shot, and explained what was happening.