First of all, one is technically a chemical liquid, the other is a plant. Tobacco is worse than vaping only because we know it has over 4,700 toxins. But vaping is really new and we can't be really sure about its effects.
What I can tell you though, is that vaping is not a solution to stop smoking. It's an alternative, and a bad one, because technically you can consume a lot more nicotine through a vaporizer and get even more hooked. Also, when I vape, the e-liquid accumulates in my throat and I always have to cough or clear my throat, spitting and etc. KInda nasty tbh.
ALSO, handling is so messy. I think it's just not as messy as a hookah, but cleaning you vape and all that jazz, and then it starts leaking... nightmare.