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Disagree. It does make a difference. The advantage with nitrogen is it's thicker too so it won't go down over time through any tiny leaks like air should. I however hate the fact that you have to pay for it over here. Over in Spain and Brazil you can get it at petrol stations for free.
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+1
Nitrogen is lighter than air, slightly, but has larger molecules.
I could go into business as we have a bulk liquid Nitrogen facility where I work

We use it in place of air lines as it is much dryer and cleaner.
Cheers
Thebassman