Both pods deliver the same nicotine salt formula in the same 3% and 5% strengths, so the choice comes down to taste rather than technology
Inhalation of chromium, a known human carcinogen, has been shown to cause lung cancer in steel workers, per the CDC
Regul Toxicol Pharmacol 81(Suppl 2):S27S47 Forster M, Fiebelkorn S, Yurteri C, Mariner D, Liu C, Wright C, McAdam K, Murphy J, Proctor C (2018) Assessment of novel tobacco heating product THP1.0
If youre travelling to Great Britain (England, Wales or Scotland) from outside the UK, your personal allowances mean you can bring in a certain amount of goods without paying tax or duty
For those who choose to continue smoking, general dentistry advice would be to limit the amount of time spent puffing away on cigars or cigarettes and the frequency with which you do so to minimize any adverse effects on your oral hygiene