Vaping really stinks, most I've been around smelled like burned sugar..........
How it smells depends on what liquid they're using. And also the type of vaper as some are so powerful you get huge clouds of steam when exhaling.
Many use a fruity flavour to vape which would of course smell sweet.
I never vape that, not keen on it either. After all, I don't smoke fruit so I don't see the point of vaping fruit flavour.
The liquid I buy is 'tobacco'. Doesn't smell the exact same as real tobacco, nor nearly as strong, but that too depends on the brand and maybe the amount of nicotine in it.
I use 0% or 0% with a tiny little bit of 3% nicotine in it.
I doubt anyone would smell anything much coming from my vaping.