I've vaped the original and the N2, and they are fairly different w/r/t airflow. That being said, I like to think the metal sleeve over top acts as a heat sink, and I've noticed when vaping my tank doesn't get hot (that said, I vape the 1.8 coil at 7--8 watts, and my vape stays cool). When I first started, I was supremely worried about this thread, but I have come to understand that if I'm not using TC, I can still be cautious about not chain vaping (too much), keeping my watts as low as is feasible, and I did want to get into coilbuilding in part due to wanting the ability to TC if I enjoyed it, which I do, but I think there will always be a place for a small, non-rebuildable tank in my life as I feel far from confident in taking any RTA out of the house and not having a wick/coil/leakage issue that I can't fix and would be problematic.
And yes, even at higher temps, I do feel it's safer than smoking. This thread doesn't scare me as much anymore, because I can use the information that is helpful, while also accepting that every action in life carries a certain amount of risk. Including breathing air.
Anna